80_FR_30239 80 FR 30138 - Airworthiness Directives; International Aero Engines AG Turbofan Engines

80 FR 30138 - Airworthiness Directives; International Aero Engines AG Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 80, Issue 101 (May 27, 2015)

Page Range30138-30144
FR Document2015-12068

We are superseding Airworthiness Directive (AD) 2012-09-09 for all International Aero Engines AG (IAE) V2500-A1, V2525-D5, and V2528- D5 turbofan engines, and certain serial numbers (S/Ns) of IAE V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 turbofan engines. AD 2012-09-09 required cleaning, eddy current inspection (ECI) or fluorescent penetrant inspection (FPI), and initial and repetitive ultrasonic inspections (USIs) of certain high-pressure compressor (HPC) stage 3 to 8 drums, as well as replacement of the drum attachment nuts. This new AD expands the affected population for initial and repetitive USIs of the HPC stage 3 to 8 drum, revises the inspection intervals, requires performing ECI or FPI, requires removal of the affected attachment nuts and any HPC stage 3 to 8 drum found cracked, and adds a mandatory terminating action. This AD was prompted by the discovery that additional attachment nuts for certain HPC stage 3 to 8 drums are affected. We are issuing this AD to prevent failure of the HPC stage 3 to 8 drum, which could result in uncontained drum failure, damage to the engine, and damage to the airplane.

Federal Register, Volume 80 Issue 101 (Wednesday, May 27, 2015)
[Federal Register Volume 80, Number 101 (Wednesday, May 27, 2015)]
[Rules and Regulations]
[Pages 30138-30144]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-12068]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-1100; Directorate Identifier 2009-NE-37-AD; 
Amendment 39-18159; AD 2015-10-04]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines AG Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are superseding Airworthiness Directive (AD) 2012-09-09 for 
all International Aero Engines AG (IAE) V2500-A1, V2525-D5, and V2528-
D5 turbofan engines, and certain serial numbers (S/Ns) of IAE V2522-A5, 
V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 
turbofan engines. AD 2012-09-09 required cleaning, eddy current 
inspection (ECI) or fluorescent penetrant inspection (FPI), and initial 
and repetitive ultrasonic inspections (USIs) of certain high-pressure 
compressor (HPC) stage 3 to 8 drums, as well as replacement of the drum 
attachment nuts. This new AD expands the affected population for 
initial and repetitive USIs of the HPC stage 3 to 8 drum, revises the 
inspection intervals, requires performing ECI or FPI, requires removal 
of the affected attachment nuts and any HPC stage 3 to 8 drum found 
cracked, and adds a mandatory terminating action. This AD was prompted 
by the discovery that additional attachment nuts for certain HPC stage 
3 to 8 drums are affected. We are issuing this AD to prevent failure of 
the HPC stage 3 to 8 drum, which could result in uncontained drum 
failure, damage to the engine, and damage to the airplane.

DATES: This AD is effective July 1, 2015.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of July 1, 
2015.

ADDRESSES: For service information identified in this AD, contact 
International Aero Engines AG, 400 Main Street, East Hartford, CT 
06118; phone: 860-368-3700; fax: 860-368-4600; email: 
[email protected]; Internet: https://www.iaeworld.com. You may view 
this service information at the FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA. For information on the 
availability of this material at the FAA, call 781-238-7125. It is also 
available on the Internet at http://

[[Page 30139]]

www.regulations.gov by searching for and locating Docket No. FAA-2009-
1100

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2009-
1100; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this AD, the regulatory evaluation, any comments received, and 
other information. The address for the Docket Office (phone: 800-647-
5527) is Document Management Facility, U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Martin Adler, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 12 
New England Executive Park, Burlington, MA 01803; phone: 781-238-7157; 
fax: 781-238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2012-09-09, Amendment 39-17044 (77 FR 30371, 
May 23, 2012), (``AD 2012-09-09''). AD 2012-09-09 applied to all IAE 
V2500-A1, V2525-D5, and V2528-D5 turbofan engines, and certain S/Ns of 
IAE V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, and 
V2533-A5 turbofan engines. The NPRM published in the Federal Register 
on December 24, 2014 (79 FR 77411). The NPRM was prompted by the 
discovery that partially silver-plated nuts for certain HPC stage 3 to 
8 drums cause the drum to corrode and crack. The NPRM proposed to 
perform ECI or FPI, and initial and repetitive USIs of certain HPC 
stage 3 to 8 drums. The NPRM also proposed to expand the affected 
population for initial and repetitive USIs of the HPC stage 3 to 8 
drum, revise the inspection intervals, require removal of the affected 
attachment nuts and any HPC stage 3 to 8 drum found cracked, and add a 
mandatory terminating action. We are issuing this AD to prevent failure 
of the HPC stage 3 to 8 drum, which could result in uncontained drum 
failure, damage to the engine, and damage to the airplane.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comments received on the NPRM (79 
FR 77411, December 24, 2014) and the FAA's response to each comment.

Request To Change Compliance Paragraph

    One commenter requested that paragraph (f)(3) of the NPRM (79 FR 
77411, December 24, 2014) be changed from ``If you inspect the HPC 
stage 3-8 drum at shop visit . . .'' to ``If you have previously 
inspected the HPC stage 3-8 drum at piece-part exposure as shown in the 
Grace Periods Table for each compliance group listed in paragraph 1.E. 
in IAE Alert Non-Modification Service Bulletin (NMSB) No. V2500-ENG-72-
A0615, Revision 6, dated September 4, 2014.'' The justification for 
this comment is that the AD wording is not clear enough for the actual 
work performed.
    We partially agree. We agree with referring to piece-part exposure 
instead of shop visit. We disagree with referencing the service 
bulletin (SB) because the AD wording is otherwise clear in its 
reference to the Grace Periods Table for each compliance group. We 
changed paragraph (f)(3) of this final rule by changing ``at shop 
visit'' to ``at piece-part exposure.''

Request for Paragraph Clarification

    The same commenter suggested adding engine manual (EM) Task No. or 
SB reference to paragraphs (g)(2), (g)(3)(i), and (g)(3)(ii) because 
these paragraphs do not provide the specific method to perform the 
stated requirements.
    We do not agree. The SB and EM tasks for these operations are not 
mandated. Therefore, they are referenced in the Related Information 
section of the AD. We did not change the AD.

Request To Clarify Terminating Action

    Lufthansa, United Airlines (UA), and another commenter, asked that 
the AD be clarified that if the terminating actions were performed 
prior to the effective date of the AD, credit may be taken and no 
further action would be required. The commenter's justification is that 
the AD should be clear that if the parts are installed prior to 
effective date of the AD, the parts installation should be considered 
as terminating action.
    We do not agree because paragraph (e), Compliance, states to 
perform the requirements of the AD ``unless already done.'' This 
statement applies to all requirements of the AD including the 
terminating action. No additional clarification is needed. We did not 
change the AD.

Request To Change Compliance Time

    An anonymous commenter requested that repetitive inspections not 
start until after the threshold for the initial inspection has been 
reached. The justification for this request is that many unnecessary 
extra inspections would have to be performed if the initial inspection 
is performed early, and the AD requires repeat inspections to follow 
immediately.
    We agree. This final rule was changed as follows: Paragraphs (f)(1) 
and (f)(2) were changed from ``. . . of the last USI.'' to ``. . . of 
the last USI after the initial inspection required by paragraph (e) of 
this AD.''

Agreement With Proposed AD

    The Boeing Company agreed with the NPRM (79 FR 77411, December 24, 
2014) as written.

Request Change to Costs of Compliance

    Lufthansa and Wizz Air stated that the terminating action will 
result in many unplanned extra shop visits to remove parts. The cost 
analysis does not include the cost associated with these extra shop 
visits.
    We do not agree. The Costs of Compliance in the AD includes 
prorated part costs based on early removal of parts. Our cost 
calculations do not include costs associated with engine removal, down 
time, or scheduling. We did not change the AD.

Request To Include Revision and Date Information for Service 
Information

    Lufthansa and IAE requested that service information include 
revision and date information. They suggested that the service 
information does not list the latest revision information or, in some 
cases, any revision information at all.
    We partially agree. We agree that the SB references should reflect 
the latest revision. We disagree with adding the revision and/or date 
to all instances of SBs referenced in the Related Information paragraph 
because the revision date is listed on the first instance of each SB 
referenced in the paragraph. We changed the Related Information 
paragraph by changing the date of IAE NMSB No. V2500-ENG-72-0625 to 
October 8, 2014.

Request To Change Applicability

    Lufthansa stated that the compliance categories (applicability) are 
based on engine serial number. The commenter suggested defining the 
categories based on drum serial number rather than engine serial number 
because the inspection times and intervals should be based on the drum 
history. The correct

[[Page 30140]]

inspection times and intervals may not be utilized for the affected 
drums if a drum moves from one engine to another.
    We do not agree. We evaluated use of drum serial numbers versus 
engine serial numbers and chose engine serial numbers based on the 
increased complexity associated with tracking drum serial numbers. It 
was also noted that it is more likely that an engine, as opposed to an 
individual used drum, would be moved. The engine groups in the AD 
reflect the unsafe condition as it exists today. If the engine 
distributions change significantly in the future, we would consider 
additional rulemaking. We did not change the AD.

Request To Change Service Information

    Rolls Royce plc proposed that revision 6 of IAE Alert NMSB No. 
V2500-ENG-72-0615 be quoted in the AD, and that all references to it, 
including engine groups affected, be aligned to this latest revision. 
The justification for this request is that the current AD references 
IAE NMSB No. V2500-ENG-72-0615, Revision 3. This NMSB is now at 
revision 6.
    We do not agree because the AD already references Revision 6 of IAE 
Alert NMSB No.V2500-ENG-72-A0615. We did not change the AD.

Request Clarification of Material Incorporated by Reference

    UA and Delta Airlines requested clarification of whether IAE NMSB 
No. V2500-ENG-72-0638 is considered incorporated by reference. This AD 
will incorporate by reference IAE Alert NMSB No. V2500-ENG 72-0615, 
Revision 6, dated September 4, 2014, which refers to IAE NMSB No. 
V2500-ENG-72-0638 for instructions on performing the USI. IAE NMSB No. 
V2500-ENG-72-0638 contains instructions and procedures that do not 
affect failure mode detection, prevention or elimination of the unsafe 
condition identified in the NPRM (79 FR 77411, December 24, 2014) and 
should not be mandated by the AD.
    We agree that IAE Alert NMSB No.V2500-ENG-72-0638 should not be 
incorporated by reference. We changed the AD to remove the requirement 
to use IAE NMSB No. V2500-ENG-72-0638. We also added a new paragraph 
(g) to this AD that provides specific information from IAE NMSB No. 
V2500-ENG-72-0638 to perform the USI.

Request Change to Relevant Service Information

    UA and Delta Airlines requested that IAE NMSB No. V2500-ENG-72-0638 
be added to the Relevant Service Information paragraph.
    We partially agree. We do not agree with adding IAE NMSB No. V2500-
ENG-72-0638 to the Relevant Service Information paragraph because that 
paragraph is not in the final rule. We agree that the service 
information should be included in the AD, elsewhere. We added IAE NMSB 
No. V2500-ENG-72-0638 to the Related Information paragraph.

Request Clarification of Compliance Time

    UA and LATAM Airlines requested clarification on the difference 
between the AD and SB terminating actions for compliance time to 
incorporate terminating action. The AD requires accomplishment within 
9,450 cycles after the effective date of the AD, while the SB requires 
accomplishment by December 31, 2021. The commenter said shop visits 
were planned based on the end date in the SB. The AD limit of 9,450 
cycles will force engines off wing earlier than planned.
    We do not agree. The cycle limit in the AD represents fleet average 
utilization up to the SB `accomplish by' date. We did not change the 
AD.

Request Clarification for Terminating Action

    UA requested clarification that inspections are not required after 
the terminating action has been performed. UA suggested that this 
clarification was required because the SB Grace Periods Tables include 
timing for any drum fitted with non-silver nuts. It is not explicit 
that the table does not apply to a new drum with non-silver nuts.
    We do not agree. Terminating action means that no further action is 
required. Therefore, the AD does not require any additional inspections 
after the terminating action has been accomplished. We did not change 
the AD.

Request Deletion of Service Information

    UA identified that IAE NMSB No. V2500-ENG-72-0638, Part B paragraph 
(3)Y.(3) states that an engine be rejected if staining and/or cracking 
of the ceramic liner is found. This requirement should not be mandated 
because this concern was addressed in AD 2012-09-09 which was 
superseded. The FAA agreed that there was not clear acceptance criteria 
to mandate engine rejection based on staining and axial cracking of the 
HPC stage 7 to 8 drum ceramic liner.
    We agree. We changed this final rule by deleting reference to IAE 
NMSB No. V2500-ENG-72-0638 in paragraph (e) of this AD.

Request To Include a Ferry Flight

    UA requested that the AD be changed to allow a one-cycle ferry 
flight. No justification was given.
    We do not agree. Per 14 CFR 39.23, an AD only addresses ferry 
flights if they are prohibited. We did not prohibit ferry flights in 
this AD. We did not change the AD.

Request Clarification of Compliance Time

    UA commented that some grace periods in AD 2012-09-09 are different 
from the NPRM (79 FR 77411, December 24, 2014). UA requested 
clarification that the older compliance times in AD 2012-09-09 are no 
longer applicable or available and let ``Credit for Previous Actions'' 
allow the longer compliance times of the NPRM. The clarification was 
requested since, for compliance intervals that have been shortened, the 
commenter can see no way to address those engines, particularly if the 
engine has already exceeded the shortened interval. For intervals that 
have been extended, inspection intervals can easily be extended to 
agree.
    We do not agree. AD 2012-09-09 is being superseded by this AD; 
therefore, the previous compliance times are inapplicable after the 
effective date of this AD. This final rule allows 200 cycles after the 
effective date of the AD to perform the initial USI if the cycles since 
new threshold has been passed. If the cyclic interval allowed by this 
AD for the next USI based on the last part inspection has been 
surpassed, then the initial inspection requirements would apply. This 
means you must inspect within 200 cycles after the effective date of 
this AD. We did not change the AD.

Request To Change Service Information

    UA stated that the USI procedures, as defined in IAE NMSB No. 
V2500-ENG-72-0638, which lift the probe off the surface of the drum, 
should not be mandated. The USI procedures, in IAE NMSB No. V2500-ENG-
72-0638, use a ``clamp'' added to the USI probe to lift the probe off 
of the drum. This procedure relies on couplant to fill the gaps to the 
drum and any missing drum coatings. UA is not confident that accurate 
measurements can be consistently achieved using this procedure, 
especially in areas that have been repaired.
    We partially agree. We agree that the USI procedures in IAE NMSB 
No. V2500-ENG-72-0638, and those referenced in superseded AD 2012-09-
09, are valid methods of inspection. We

[[Page 30141]]

disagree that the procedure in IAE NMSB No. V2500-ENG-72-0638 would not 
provide accurate measurements. We changed this AD by removing IAE NMSB 
No. V2500-ENG-72-0638 and adding a paragraph that provides specific 
information to perform the USI.

Request To Change Service Information

    Jetstar Group Airways requested that allowance for future SB 
revisions be included in the AD.
    We do not agree. We cannot mandate documents which do not yet 
exist. We did not change the AD.

Request To Change the Applicability

    Jetstar Group Airways requested that the applicability for V2500-A5 
engines be revised to exclude Engine Serial Number (ESN) V16660 and 
higher as the introduction of the terminating action configuration 
began with ESN V16660 based on the applicability of IAE SB V2500-ENG-
72-0632 that introduced silver free nuts.
    We do not agree. The AD applicability is correct. The applicability 
defined in IAE SB V2500-ENG-72-0632 does not reflect actual part 
installations. We did not change the AD.

Request To Allow Repetitive Inspections

    Lufthansa, Jetstar Group Airways, Wizz Air, and MTU Maintenance 
(MTU) requested to remove ``within 9,450 cycles after the effective 
date of the AD'' for terminating action and allow unlimited USI. The 
commenters pointed out that the unsafe condition results from a 
corrosive operating environment, and the amount of corrosion varies 
with time and location. The commenters also pointed to the lack of data 
to support a calendar end date of 2021, and that the hard time for part 
removals will drive younger parts off wing early, with no additional 
benefits to safety. Finally, the commenters offered that if the USI and 
the ECI provide sufficient safety against an uncontained failure, this 
should also be the case after 9,450 flight cycles (FC). Additionally, 
the overall risk in the fleet will decrease due to the number of 
planned shop visits.
    We do not agree. The ongoing repetitive inspections do not provide 
sufficient safety by themselves and are considered interim actions. The 
previous ADs did not include an end date because no terminating action 
was available. This AD includes mandatory terminating action that 
completely removes the noted unsafe condition and restores an 
acceptable level of safety. We did not change the AD.

Request To Change Terminating Action

    Wizz Air, Lufthansa, and Delta Airlines requested the compliance 
time for terminating action be changed from ``9,450 FC after the 
effective date of the AD'' to ``at next piece-part exposure.'' This 
will eliminate extra shop visits solely for drum replacement.
    We do not agree. This change would significantly increase the need 
for spare parts in the near term, which cannot be supported by industry 
at this time. We did not change the AD.

Request To Change Compliance

    IAE requested that the Compliance phrase ``If cracks are found . . 
.'' be changed to ``if crack indications or inspection rejections are 
found . . .''. The reason for this request is that FPI, USI, and ECI 
only indicate a crack may be present. Cracks typically can only be 
confirmed via lab destructive testing.
    We do not agree. If a part fails the inspection it is assumed to be 
cracked. No additional testing is requested or required to prove a 
crack exists. We did not change the AD.

Request To Change Compliance

    IAE and MTU requested that ``cycles since new'' (CSN) refer to 
cycles on the specific drum and not engine cycles since new. If drums 
are replaced, there could be confusion on when a part must be 
inspected.
    We agree. We changed paragraphs (e)(1) through (e)(5) from ``within 
200 cycles of accumulating xxxx CSN'' to ``within 200 cycles of the 
drum accumulating xxxx cycles.''

Request To Change Compliance Time

    IAE and MTU requested an end date of December 31, 2025 be added to 
the compliance time in addition to the existing cycle limit. This 
request was justified because low utilization operators will not be 
required to upgrade their engines until well beyond 2040 with only the 
cycle limit. IAE is concerned that after the larger operators have 
completed the upgrades to their fleets, the expertise and equipment 
required to perform the required inspections will no longer be 
available.
    We agree. We changed the Mandatory Terminating Action paragraph to 
include an end date of December 31, 2025.

Request Change To Credit for Previous Actions Paragraph

    IAE requested that IAE NMSBs No. V2500-ENG-72-0594, No. V2500-ENG-
72-0603, No. V2500-ENG-72-0608, Revision 2 and earlier, and No.V2500-
ENG-72-0615, Revision 2 and earlier, be removed from the ``Credit for 
Previous Actions'' paragraph because these SB revisions do not require 
complete inspection of the drum circumference in areas of liner loss. 
Incomplete inspections are not effective at detecting cracks and 
compromises safety.
    We agree. We removed IAE NMSB No. V2500-ENG-72-0594, IAE NMSB No. 
V2500-ENG-72-0603, IAE NMSB No. V2500-ENG-72-0608, Revision 2 and 
earlier, and IAE NMSB No.V2500-ENG-72-A0615, Revision 2 and earlier, 
from the Credit for Previous Actions paragraph.

Request To Simplify Compliance

    Delta Airlines commented that the compliance plan as proposed in 
the NPRM (79 FR 77411, December 24, 2014), is too complicated. Delta 
said that it requires: (1) Knowledge of where the HPC 3-8 drum(s) have 
operated by flight number for the V2500-A1 and V2500-A5 engine models; 
(2) tracking the inspections performed at shop level for the HPC 3-8 
drum(s); (3) tracking the HPC module assembly for the 3-8 drum(s) 
installed and the configuration at the last shop visit of the HPC 
module; and (4) operators to trace documents of HPC 3-8 drum(s) that 
exchanged between HPC modules and from other operators. Without those 
trace documents, operators will be forced to obtain new HPC 3-8 drum(s) 
to prevent recontamination of their respective fleets.
    We do not agree. The changes we proposed in this AD, expanding the 
population, changing the inspection interval, etc., are not complex 
changes to the compliance program. We also evaluated the original 
compliance program requirements. We did not conclude that they were so 
complex that operators would find them difficult to understand, 
particularly since the information needed to comply with the AD is 
available in operator records. We did not change the AD.

Request Clarification of Service Information

    Delta Airlines stated that IAE Alert NMSB No. V2500-ENG-72-A0615, 
Revision 6, has lists of engine models and drum part numbers. The SB 
lists drum part numbers as associated with the V2500-D5 engine that are 
not approved for installation on the V2500-D5 engine. The SB could be 
misinterpreted as allowing use of part numbers on the V2500-D5 engine 
model that have not actually been approved for use.
    We do not agree. The SB separates engine applicability into six 
groups. The drum part numbers listed for each group

[[Page 30142]]

represent the possible drum part numbers for all the noted engine 
models listed in the group. These groupings do not otherwise indicate 
that part numbers are interchangeable among the engine models. The 
groups that include V2500-D5 (Group E and group F) also include other 
engine models. We did not change the AD.

Request Clarification of Mandatory Terminating Action Paragraph

    Lufthansa requested clarification of the Mandatory Terminating 
Action paragraph. The commenter stated that the paragraph directing the 
installation of HPC stage 3 to 8 drum is not clear if the mandatory 
terminating action is meant to be a hard-time limit which requires 
removal of drums from service by means of a shop visit. The commenter 
suggested that the terminating action for drum replacement may be 
substituted by an on-wing USI. On-wing USI could occur after 9,450 FC 
from the effective date of this AD until the engine has a shop visit.
    We do not agree. The mandatory terminating action has a hard-time 
limit of 9,450 FC after the effective date of this AD. The terminating 
actions must be performed within this time. The AD does not give 
allowance to perform inspections in place of performing the terminating 
actions. We did not change the AD.

Request To Revise Mandatory Terminating Action

    MTU requested that the mandatory terminating action be delayed 
based on the appropriate inspection grace period listed in the service 
information. The grace period extension would eliminate extra shop 
visits for only drum replacement.
    We do not agree. The cyclic intervals listed in the service 
information, based on piece-part inspection, apply to the threshold for 
performing the next USI. The compliance time for completing the 
terminating actions is not related to when or what inspections were 
performed. We did not change the AD.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this AD with the changes described previously. We have determined that 
these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM (79 FR 77411, December 24, 2014) for correcting the unsafe 
condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (79 FR 77411, December 24, 2014).
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this AD.

Related Service Information Under 1 CFR Part 51

    International Aero Engines Alert NMSB No. V2500-ENG-72-A0615, 
Revision 6, dated September 4, 2014. The NMSB describes procedures for 
inspecting the engine front support pins. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section of this AD.

Costs of Compliance

    We estimate that this AD will affect 956 engines installed on 
airplanes of U.S. registry. We estimate that it will take about 3 hours 
per engine to perform the USI and about 2 hours per engine to perform 
the FPI or ECI of the HPC stage 3 to 8 drum. We also estimate that 
removing silver residue from the HPC stage 3 to 8 drum will cost about 
$2,600 per engine and a set of silver free nuts will cost about $1,060 
per engine. We estimate the pro-rated replacement cost to replace an 
HPC stage 3 to 8 drum to be $52,014. Based on these figures, we 
estimate the cost of this AD on U.S. operators to be $53,630,644.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska to the extent 
that it justifies making a regulatory distinction, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2012-09-09, Amendment 39-17044 (77 FR 30371, May 23, 2012), and adding 
the following new AD:

2015-10-04 International Aero Engines AG: Amendment 39-18159 Docket 
No. FAA-2009-1100; Directorate Identifier 2009-NE-37-AD.

(a) Effective Date

    This AD is effective July 1, 2015.

(b) Affected ADs

    This AD replaces AD 2012-09-09, Amendment 39-17044 (77 FR 30371, 
May 23, 2012).

(c) Applicability

    This AD applies to:
    (1) All International Aero Engines AG (IAE) V2500-A1 turbofan 
engines; and
    (2) All IAE V2525-D5 and V2528-D5 turbofan engines; and
    (3) IAE V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, 
V2530-A5, and V2533-A5 turbofan engines with serial numbers (S/Ns) 
V10001 through V13190, and V15001 through V16728, excluding V16707.

[[Page 30143]]

(d) Unsafe Condition

    This AD was prompted by the discovery that additional attachment 
nuts for certain high-pressure compressor (HPC) stage 3 to 8 drums 
cause the drum to corrode and crack. We are issuing this AD to 
prevent failure of the HPC stage 3 to 8 drum, which could result in 
uncontained drum failure, damage to the engine, and damage to the 
airplane.

(e) Compliance

    Comply with this AD within the compliance times specified, 
unless already done. You may use the inspections listed in paragraph 
(h)(3) of this AD instead of an ultrasonic inspection (USI) for the 
initial inspection required by paragraphs (e)(1) through (e)(5). If 
cracks are found during any of the inspections required by this AD, 
remove the drum from service before further flight.

(1) Initial USI of the HPC Stage 3 to 8 Drum--Group ``A'' and Group 
``B''

    For IAE V2500-A1 turbofan engines with S/Ns listed in ``Group 
A'' or ``Group B'' in paragraph 1.E. in IAE Alert Non-Mandatory 
Service Bulletin (NMSB) No. V2500-ENG-72-A0615, Revision 6, dated 
September 4, 2014, perform an initial USI of the HPC stage 3 to 8 
drum within 200 cycles of the drum accumulating 8,000 cycles or 
within 200 cycles from the effective date of this AD, whichever 
occurs later.

(2) Initial USI of the HPC Stage 3 to 8 Drum--Group ``C''

    For IAE V2500-A5 turbofan engines with S/Ns listed in ``Group 
C'' in paragraph 1.E. in IAE Alert NMSB No. V2500-ENG-72-A0615, 
Revision 6, dated September 4, 2014, perform an initial USI of the 
HPC stage 3 to 8 drum within 200 cycles of the drum accumulating 
6,250 cycles or within 200 cycles from the effective date of this 
AD, whichever occurs later.

(3) Initial USI of the HPC Stage 3 to 8 Drum--Group ``D''

    For IAE V2500-A5 turbofan engines with S/Ns listed in ``Group 
D'' in paragraph 1.E. in IAE Alert NMSB No. V2500-ENG-72-A0615, 
Revision 6, dated September 4, 2014, perform an initial USI of the 
HPC stage 3 to 8 drum within 200 cycles of the drum accumulating 
3,750 cycles or within 200 cycles from the effective date of this 
AD, whichever occurs later.

(4) Initial USI of the HPC Stage 3 to 8 Drum--Group ``E''

    For IAE V2500-A1, -A5, and -D5 turbofan engines not listed in 
``Group A,'' ``Group B,'' ``Group C,'' or ``Group D,'' and with drum 
assembly part numbers (P/Ns) listed in ``Group E'' in paragraph 1.E. 
in IAE Alert NMSB No. V2500-ENG-72-A0615, Revision 6, dated 
September 4, 2014, perform an initial USI of the HPC stage 3 to 8 
drum within 200 cycles of the drum accumulating 12,500 cycles or 
within 200 cycles from the effective date of this AD, whichever 
occurs later.

(5) Initial USI of the HPC Stage 3 to 8 Drum--Group ``F''

    For IAE V2500-A1, -A5, and -D5 turbofan engines not listed in 
``Group A,'' ``Group B,'' ``Group C,'' or ``Group D,'' and with drum 
assembly P/Ns listed in ``Group F'' in paragraph 1.E. in IAE Alert 
NMSB No. V2500-ENG-72-A0615, Revision 6, dated September 4, 2014, 
perform an initial USI of the HPC stage 3 to 8 drum within 200 
cycles of the drum accumulating 9,000 cycles or within 200 cycles 
from the effective date of this AD, whichever occurs later.

(f) Repetitive USIs of the HPC Stage 3 to 8 Drum

    (1) For engines included in ``Group A,'' ``Group B,'' ``Group 
C,'' ``Group E,'' or ``Group F,'' as defined in paragraph (e) of 
this AD, perform repetitive USIs of the HPC stage 3 to 8 drum within 
every 750 cycles of the last USI after the initial inspection 
required by paragraph (e) of this AD.
    (2) For engines included in ``Group D,'' as defined in paragraph 
(e) of this AD, perform repetitive USIs of the HPC stage 3 to 8 drum 
within every 500 cycles of the last USI after the initial inspection 
required by paragraph (e) of this AD.
    (3) If you inspect the HPC stage 3 to 8 drum at piece-part 
exposure, you may delay the next USI as shown in the ``Grace Periods 
Table'' for each compliance group listed in paragraph 1.E. in IAE 
Alert NMSB No. V2500-ENG-72-A0615, Revision 6, dated September 4, 
2014.

(g) USI Procedure for the Inspection of the HPC Stage 3 to 8 Drum

    For the USI inspections required by this AD, do the following. 
Inspect the stage 8 disk of the HPC stage 3 to 8 drum on the outer 
diameter adjacent to the stage 7 to 8 electron beam weld land using 
ultrasonic probe manipulator assembly P/N IAE2R19865 for IAE V2500-
A1 engines, P/N IAE2R19852 or IAE2R19879 for IAE V2500-A5 engines, 
and P/N IAE2R19874 for IAE V2500-D5 engines. Inspect the stage 8 
disk of the HPC stage 3 to 8 drum on the inner diameter at the inner 
radius position using ultrasonic probe manipulator assembly P/N 
IAE2R19870 for IAE V2500-A1 engines, P/N IAE2R19859 or IAE2R19880 
for IAE V2500-A5 engines, and P/N IAE2R19876 for IAE V2500-D5 
engines. Inspect the full circumference of both the inner and outer 
diameters. If the entire circumference cannot be inspected, remove 
the drum from the engine before further flight.
    (1) Calibrate the ultrasonic equipment using the following 
parameters and the acceptance criteria listed in paragraph 
3.A.(1)(a) of IAE Alert NMSB No. V2500-ENG-72-A0615, Revision 6, 
dated September 4, 2014. Use working standard P/N IAE2R19854 for 
outer diameter inspection and working standard P/N IAE2R19860 for 
inner diameter inspection:
    (i) Set Frequency to 5 Mhz.
    (ii) Set Rectify to Full Wave.
    (iii) Set Pulser to Single Crystal.
    (iv) Maximize the signal response to achieve 70 percent full 
screen height.
    (v) Adjust the range control to position the target signal at 
5.0 time base position based on ten division time base.
    (vi) For outer diameter inspection, set Gate Position to 3.5-7.0 
time base position based on ten division time base.
    (vii) For inner diameter inspection, set Gate Position to 3.0-
8.0 time base position based on ten division time base.
    (2) Inspect the HPC stage 3 to 8 drum using the acceptance 
criteria listed in paragraph 3.A.(1)(a) of IAE Alert NMSB No. V2500-
ENG-72-A0615, Revision 6, dated September 4, 2014.
    (3) After completing the inspection of each feature, verify the 
calibration of the ultrasonic equipment. If the calibration is under 
sensitivity by more than 3db, then repeat the calibration and 
inspection of the feature.

(h) Removal of Silver-Plated Nuts

    At the next piece-part exposure of the HPC stage 3 to 8 drum 
after the effective date of this AD, do the following before 
returning any HPC stage 3 to 8 drum to service:
    (1) Remove from service all silver-plated nuts (fully or 
partially-plated), P/Ns AS44862 or AS64367, that attach the HPC 
stage 3 to 8 drum to the HPC stage 9 to 12 drum.
    (2) Clean the HPC stage 3 to 8 drum to remove the silver 
residue.
    (3) Inspect the HPC stage 3 to 8 drum using at least one of the 
following methods:
    (i) Fluorescent penetrant inspection (FPI) of the HPC stage 3 to 
8 drum for cracks, or
    (ii) Eddy current inspection (ECI) of the HPC stage 3 to 8 drum 
for cracks.

(i) Installation Prohibition

    After the effective date of this AD, do not install any silver-
plated nuts, P/N AS44862 or AS64367, into any engine.

(j) Mandatory Terminating Action

    Within 9,450 cycles after the effective date of this AD, but not 
later than December 31, 2025, install:
    (1) An HPC stage 3 to 8 drum that has never operated with 
silver-plated nuts (fully or partially plated) to attach the HPC 
stage 3 to 8 drum to the HPC stage 9 to 12 drum, with
    (2) silver-free nuts to attach the HPC stage 3 to 8 drum to the 
HPC stage 9 to 12 drum.

(k) Definition

    For the purpose of this AD, ``piece-part exposure'' is removal 
of the HPC stage 3 to 8 drum from the engine, removal of all blades 
from the drum, and separation of the HPC stage 3 to 8 drum from the 
stage 9 to 12 drum.

(l) Credit for Previous Actions

    If you performed an inspection of the HPC stage 3 to 8 drum 
before the effective date of this AD using one of the following IAE 
NMSBs, you met the initial inspection requirement of paragraph (e) 
of this AD:
    (i) IAE NMSB No. V2500-ENG-72-0608, Revision 3, dated September 
20, 2011.
    (ii) IAE NMSB No. V2500-ENG-72-0615, Revision 3, dated September 
20, 2011; IAE Alert NMSB No. V2500-ENG-72-0615, Revision 4, dated 
May 2, 2013; and IAE Alert NMSB No. V2500-ENG-72-0615, Revision 5, 
dated August 5, 2014.
    (iii) IAE NMSB No. V2500-ENG-72-0638, dated April 11, 2013.

[[Page 30144]]

(m) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(n) Related Information

    (1) For more information about this AD, contact Martin Adler, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 12 New England Executive Park, Burlington, MA 
01803; phone: 781-238-7157; fax: 781-238-7199; email: 
[email protected].
    (2) IAE NMSB No. V2500-ENG-72-0638, dated April 11, 2013; IAE 
NMSB No. V2500-ENG-72-0637, dated May 2, 2013; IAE NMSB No. V2500-
ENG-72-0625, dated October 8, 2014; IAE EM Task 72-41-11-200-001; 
and IAE EM Task 72-41-11-110-001, which are not incorporated by 
reference in this AD, can be obtained from IAE, using the contact 
information in paragraph (o)(3) of this AD. IAE NMSB No. V2500-ENG-
72-0638, dated April 11, 2013 provides guidance on performing the 
USI. IAE NMSB No. V2500-ENG-72-0637 and IAE EM Task 72-41-11-200-001 
provide guidance on performing the FPI. Guidance on performing the 
ECI can be found in IAE NMSB No. V2500-ENG-72-0625. IAE Engine 
Manual Task 72-41-11-110-001 provides guidance on cleaning the HPC 
stage 3 to 8 drum.

(o) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) International Aero Engines Alert Non-Modification Service 
Bulletin No. V2500-ENG-72-A0615, Revision 6, dated September 4, 
2014.
    (ii) Reserved.
    (3) For IAE service information identified in this AD, contact 
International Aero Engines AG, 400 Main Street, East Hartford, CT 
06118; phone: 860-368-3700; fax: 860-368-4600; email: 
[email protected]; Internet: https://www.iaeworld.com.
    (4) You may view this service information at the FAA, Engine & 
Propeller Directorate, 12 New England Executive Park, Burlington, 
MA. For information on the availability of this material at the FAA, 
call 781-238-7125.
    (5) You may view this service information at the National 
Archives and Records Administration (NARA). For information on the 
availability of this material at NARA, call 202-741-6030, or go to: 
http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Burlington, Massachusetts, on April 30, 2015.
Colleen M. D'Alessandro,
Assistant Directorate Manager, Engine & Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. 2015-12068 Filed 5-26-15; 8:45 am]
 BILLING CODE 4910-13-P



                                                30138            Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations

                                                (c) Applicability                                          (2) Airworthy Product: For any                     DEPARTMENT OF TRANSPORTATION
                                                   This AD applies to Slingsby Aviation Ltd.            requirement in this AD to obtain corrective
                                                Models T67M260 and T67M260–T3A                          actions from a manufacturer or other source,          Federal Aviation Administration
                                                airplanes, all serial numbers, certificated in          use these actions if they are FAA-approved.
                                                any category.                                           Corrective actions are considered FAA-                14 CFR Part 39
                                                (d) Subject                                             approved if they are approved by the State
                                                                                                                                                              [Docket No. FAA–2009–1100; Directorate
                                                                                                        of Design Authority (or their delegated
                                                  Air Transport Association of America                                                                        Identifier 2009–NE–37–AD; Amendment 39–
                                                                                                        agent). You are required to assure the product
                                                (ATA) Code 27: Flight Controls.                                                                               18159; AD 2015–10–04]
                                                                                                        is airworthy before it is returned to service.
                                                (e) Reason                                                                                                    RIN 2120–AA64
                                                                                                        (h) Related Information
                                                   This AD was prompted by mandatory
                                                continuing airworthiness information (MCAI)               Refer to MCAI European Aviation Safety              Airworthiness Directives; International
                                                issued by the aviation authority of another             Agency (EASA) AD No.: 2015–0065–E, dated              Aero Engines AG Turbofan Engines
                                                country to identify and correct an unsafe               April 24, 2015, for related information. You
                                                condition on an aviation product. The MCAI                                                                    AGENCY:  Federal Aviation
                                                                                                        may examine the MCAI on the Internet at
                                                describes the unsafe condition as failure of a          http://www.regulations.gov by searching for
                                                                                                                                                              Administration (FAA), DOT.
                                                brake master cylinder pivot pin. We are                 and locating Docket No. FAA–2015–1737.                ACTION: Final rule.
                                                issuing this AD to prevent failure of a brake
                                                master cylinder pivot pin, which could cause            (i) Material Incorporated by Reference                SUMMARY:    We are superseding
                                                the rudder pedal mechanism to detach from                                                                     Airworthiness Directive (AD) 2012–09–
                                                the brake master cylinder. This failure could              (1) The Director of the Federal Register
                                                                                                        approved the incorporation by reference               09 for all International Aero Engines AG
                                                result in jammed rudder controls and
                                                consequent loss of control.                             (IBR) of the service information listed in this       (IAE) V2500–A1, V2525–D5, and
                                                                                                        paragraph under 5 U.S.C. 552(a) and 1 CFR             V2528–D5 turbofan engines, and certain
                                                (f) Actions and Compliance                                                                                    serial numbers (S/Ns) of IAE V2522–A5,
                                                                                                        part 51.
                                                   Unless already done, do the actions in                  (2) You must use this service information          V2524–A5, V2527–A5, V2527E–A5,
                                                paragraphs (f)(1) and (f)(2) of this AD.                as applicable to do the actions required by           V2527M–A5, V2530–A5, and V2533–A5
                                                   (1) Before further flight after June 16, 2015                                                              turbofan engines. AD 2012–09–09
                                                                                                        this AD, unless the AD specifies otherwise.
                                                (the effective date of this AD) and repetitively                                                              required cleaning, eddy current
                                                thereafter every 300 hours time-in-service or              (i) Marshall Aerospace and Defence Group
                                                12 months, whichever occurs first, inspect              Service Bulletin SBM 200, Revision 1, dated           inspection (ECI) or fluorescent penetrant
                                                the brake master cylinder pivot pins, part              April 2015.                                           inspection (FPI), and initial and
                                                number T67M–45–539, installed on rudder                    Note 1 to paragraph (i)(2)(i): The                 repetitive ultrasonic inspections (USIs)
                                                pedal assemblies #1 and #4. Do the                      transmittal letter for Marshall Aerospace and         of certain high-pressure compressor
                                                inspections following the Accomplishment                Defence Group SBM 200, Revision 1, dated              (HPC) stage 3 to 8 drums, as well as
                                                Instructions in Marshall Aerospace and                  April 2015, incorrectly states it transmits the       replacement of the drum attachment
                                                Defence Group Service Bulletin SBM 200,                 Initial Issue; page 1 is dated April 2015;            nuts. This new AD expands the affected
                                                Revision 1, dated April 2015. This AD does              pages 2 through 8 are dated March 2015.               population for initial and repetitive
                                                not require the retention and reporting
                                                requirements of paragraph (2) of F.
                                                                                                           (ii) Reserved.                                     USIs of the HPC stage 3 to 8 drum,
                                                COMPLETION in the Accomplishment                           (3) For Slingsby Aviation Ltd. service             revises the inspection intervals, requires
                                                Instructions of this service bulletin.                  information identified in this AD, contact            performing ECI or FPI, requires removal
                                                   (2) If, during any inspection required in            Marshall Aerospace and Defence Group, The             of the affected attachment nuts and any
                                                paragraph (f)(1) of this AD, any crack or               Airport, Newmarket Road, Cambridge, CB5               HPC stage 3 to 8 drum found cracked,
                                                distortion to a brake master cylinder pivot             8RX, UK; telephone: +44 (0) 1223 399856;              and adds a mandatory terminating
                                                pin is found, or a pivot pin fails the                  fax: +44 (0) 7825365617; email: mark.bright@          action. This AD was prompted by the
                                                dimensional check, before further flight,               marshalladg.com; Internet:                            discovery that additional attachment
                                                replace the affected pivot pin with a                   www.marshalladg.com.
                                                serviceable part. Do the replacement as
                                                                                                                                                              nuts for certain HPC stage 3 to 8 drums
                                                                                                           (4) You may view this service information          are affected. We are issuing this AD to
                                                specified in paragraph C.(1)(j) of the
                                                                                                        at the FAA, Small Airplane Directorate, 901           prevent failure of the HPC stage 3 to 8
                                                Inspection section of the Accomplishment
                                                Instructions in Marshall Aerospace and                  Locust, Kansas City, Missouri 64106. For              drum, which could result in
                                                Defence Group Service Bulletin SBM 200,                 information on the availability of this               uncontained drum failure, damage to
                                                Revision 1, dated April 2015. After doing this          material at the FAA, call (816) 329–4148. It          the engine, and damage to the airplane.
                                                replacement, continue with the repetitive               is also available on the Internet at http://
                                                                                                                                                              DATES: This AD is effective July 1, 2015.
                                                inspection requirement in paragraph (f)(1) of           www.regulations.gov by searching for
                                                this AD.                                                                                                         The Director of the Federal Register
                                                                                                        locating Docket No. FAA–2015–1737.
                                                                                                                                                              approved the incorporation by reference
                                                (g) Other FAA AD Provisions                                (5) You may view this service information
                                                                                                        that is incorporated by reference at the
                                                                                                                                                              of a certain publication listed in this AD
                                                   The following provisions also apply to this
                                                                                                        National Archives and Records
                                                                                                                                                              as of July 1, 2015.
                                                AD:                                                                                                           ADDRESSES: For service information
                                                   (1) Alternative Methods of Compliance                Administration (NARA). For information on
                                                (AMOCs): The Manager, Standards Office,                 the availability of this material at NARA, call       identified in this AD, contact
                                                FAA, has the authority to approve AMOCs                 202–741–6030, or go to: http://                       International Aero Engines AG, 400
                                                for this AD, if requested using the procedures          www.archives.gov/federal-register/cfr/ibr-            Main Street, East Hartford, CT 06118;
                                                found in 14 CFR 39.19. Send information to              locations.html.                                       phone: 860–368–3700; fax: 860–368–
                                                ATTN: Jim Rutherford, Aerospace Engineer,                                                                     4600; email: iaeinfo@iaev2500.com;
                                                FAA, Small Airplane Directorate, 901 Locust,              Issued in Kansas City, Missouri, on May
                                                                                                                                                              Internet: https://www.iaeworld.com.
mstockstill on DSK4VPTVN1PROD with RULES




                                                Room 301, Kansas City, Missouri 64106;                  18, 2015.
                                                                                                                                                              You may view this service information
                                                telephone: (816) 329–4165; fax: (816) 329–              Earl Lawrence,                                        at the FAA, Engine & Propeller
                                                4090; email: jim.rutherford@faa.gov. Before             Manager, Small Airplane Directorate, Aircraft
                                                using any approved AMOC on any airplane
                                                                                                                                                              Directorate, 12 New England Executive
                                                                                                        Certification Service.                                Park, Burlington, MA. For information
                                                to which the AMOC applies, notify your
                                                appropriate principal inspector (PI) in the             [FR Doc. 2015–12448 Filed 5–26–15; 8:45 am]           on the availability of this material at the
                                                FAA Flight Standards District Office (FSDO),            BILLING CODE 4910–13–P                                FAA, call 781–238–7125. It is also
                                                or lacking a PI, your local FSDO.                                                                             available on the Internet at http://


                                           VerDate Sep<11>2014   17:50 May 26, 2015   Jkt 235001   PO 00000   Frm 00010   Fmt 4700   Sfmt 4700   E:\FR\FM\27MYR1.SGM   27MYR1


                                                                 Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations                                           30139

                                                www.regulations.gov by searching for                    following presents the comments                       Request To Change Compliance Time
                                                and locating Docket No. FAA–2009–                       received on the NPRM (79 FR 77411,                       An anonymous commenter requested
                                                1100                                                    December 24, 2014) and the FAA’s                      that repetitive inspections not start until
                                                                                                        response to each comment.                             after the threshold for the initial
                                                Examining the AD Docket
                                                                                                        Request To Change Compliance                          inspection has been reached. The
                                                  You may examine the AD docket on
                                                                                                        Paragraph                                             justification for this request is that many
                                                the Internet at http://
                                                                                                                                                              unnecessary extra inspections would
                                                www.regulations.gov by searching for                      One commenter requested that                        have to be performed if the initial
                                                and locating Docket No. FAA–2009–                       paragraph (f)(3) of the NPRM (79 FR                   inspection is performed early, and the
                                                1100; or in person at the Docket                        77411, December 24, 2014) be changed                  AD requires repeat inspections to follow
                                                Management Facility between 9 a.m.                      from ‘‘If you inspect the HPC stage 3–                immediately.
                                                and 5 p.m., Monday through Friday,                      8 drum at shop visit . . .’’ to ‘‘If you                 We agree. This final rule was changed
                                                except Federal holidays. The AD docket                  have previously inspected the HPC stage               as follows: Paragraphs (f)(1) and (f)(2)
                                                contains this AD, the regulatory                        3–8 drum at piece-part exposure as                    were changed from ‘‘. . . of the last
                                                evaluation, any comments received, and                  shown in the Grace Periods Table for                  USI.’’ to ‘‘. . . of the last USI after the
                                                other information. The address for the                  each compliance group listed in                       initial inspection required by paragraph
                                                Docket Office (phone: 800–647–5527) is                  paragraph 1.E. in IAE Alert Non-                      (e) of this AD.’’
                                                Document Management Facility, U.S.                      Modification Service Bulletin (NMSB)
                                                Department of Transportation, Docket                    No. V2500–ENG–72–A0615, Revision 6,                   Agreement With Proposed AD
                                                Operations, M–30, West Building                         dated September 4, 2014.’’ The                          The Boeing Company agreed with the
                                                Ground Floor, Room W12–140, 1200                        justification for this comment is that the            NPRM (79 FR 77411, December 24,
                                                New Jersey Avenue SE., Washington,                      AD wording is not clear enough for the                2014) as written.
                                                DC 20590.                                               actual work performed.
                                                FOR FURTHER INFORMATION CONTACT:                                                                              Request Change to Costs of Compliance
                                                                                                          We partially agree. We agree with
                                                Martin Adler, Aerospace Engineer,                       referring to piece-part exposure instead                Lufthansa and Wizz Air stated that
                                                Engine Certification Office, FAA, Engine                of shop visit. We disagree with                       the terminating action will result in
                                                & Propeller Directorate, 12 New England                 referencing the service bulletin (SB)                 many unplanned extra shop visits to
                                                Executive Park, Burlington, MA 01803;                   because the AD wording is otherwise                   remove parts. The cost analysis does not
                                                phone: 781–238–7157; fax: 781–238–                      clear in its reference to the Grace                   include the cost associated with these
                                                7199; email: martin.adler@faa.gov.                      Periods Table for each compliance                     extra shop visits.
                                                SUPPLEMENTARY INFORMATION:                              group. We changed paragraph (f)(3) of                   We do not agree. The Costs of
                                                                                                        this final rule by changing ‘‘at shop                 Compliance in the AD includes prorated
                                                Discussion                                                                                                    part costs based on early removal of
                                                                                                        visit’’ to ‘‘at piece-part exposure.’’
                                                   We issued a notice of proposed                                                                             parts. Our cost calculations do not
                                                rulemaking (NPRM) to amend 14 CFR                       Request for Paragraph Clarification                   include costs associated with engine
                                                part 39 to supersede AD 2012–09–09,                                                                           removal, down time, or scheduling. We
                                                                                                           The same commenter suggested
                                                Amendment 39–17044 (77 FR 30371,                                                                              did not change the AD.
                                                                                                        adding engine manual (EM) Task No. or
                                                May 23, 2012), (‘‘AD 2012–09–09’’). AD
                                                                                                        SB reference to paragraphs (g)(2),                    Request To Include Revision and Date
                                                2012–09–09 applied to all IAE V2500–
                                                                                                        (g)(3)(i), and (g)(3)(ii) because these               Information for Service Information
                                                A1, V2525–D5, and V2528–D5 turbofan
                                                                                                        paragraphs do not provide the specific                   Lufthansa and IAE requested that
                                                engines, and certain S/Ns of IAE V2522–
                                                                                                        method to perform the stated                          service information include revision
                                                A5, V2524–A5, V2527–A5, V2527E–A5,
                                                V2527M–A5, V2530–A5, and V2533–A5                       requirements.                                         and date information. They suggested
                                                turbofan engines. The NPRM published                       We do not agree. The SB and EM tasks               that the service information does not list
                                                in the Federal Register on December 24,                 for these operations are not mandated.                the latest revision information or, in
                                                2014 (79 FR 77411). The NPRM was                        Therefore, they are referenced in the                 some cases, any revision information at
                                                prompted by the discovery that partially                Related Information section of the AD.                all.
                                                silver-plated nuts for certain HPC stage                We did not change the AD.                                We partially agree. We agree that the
                                                3 to 8 drums cause the drum to corrode                  Request To Clarify Terminating Action                 SB references should reflect the latest
                                                and crack. The NPRM proposed to                                                                               revision. We disagree with adding the
                                                perform ECI or FPI, and initial and                        Lufthansa, United Airlines (UA), and               revision and/or date to all instances of
                                                repetitive USIs of certain HPC stage 3 to               another commenter, asked that the AD                  SBs referenced in the Related
                                                8 drums. The NPRM also proposed to                      be clarified that if the terminating                  Information paragraph because the
                                                expand the affected population for                      actions were performed prior to the                   revision date is listed on the first
                                                initial and repetitive USIs of the HPC                  effective date of the AD, credit may be               instance of each SB referenced in the
                                                stage 3 to 8 drum, revise the inspection                taken and no further action would be                  paragraph. We changed the Related
                                                intervals, require removal of the affected              required. The commenter’s justification               Information paragraph by changing the
                                                attachment nuts and any HPC stage 3 to                  is that the AD should be clear that if the            date of IAE NMSB No. V2500–ENG–72–
                                                8 drum found cracked, and add a                         parts are installed prior to effective date           0625 to October 8, 2014.
                                                mandatory terminating action. We are                    of the AD, the parts installation should
                                                                                                        be considered as terminating action.                  Request To Change Applicability
                                                issuing this AD to prevent failure of the
                                                HPC stage 3 to 8 drum, which could                         We do not agree because paragraph                    Lufthansa stated that the compliance
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                                                result in uncontained drum failure,                     (e), Compliance, states to perform the                categories (applicability) are based on
                                                damage to the engine, and damage to the                 requirements of the AD ‘‘unless already               engine serial number. The commenter
                                                airplane.                                               done.’’ This statement applies to all                 suggested defining the categories based
                                                                                                        requirements of the AD including the                  on drum serial number rather than
                                                Comments                                                terminating action. No additional                     engine serial number because the
                                                  We gave the public the opportunity to                 clarification is needed. We did not                   inspection times and intervals should be
                                                participate in developing this AD. The                  change the AD.                                        based on the drum history. The correct


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                                                30140            Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations

                                                inspection times and intervals may not                  added to the Relevant Service                         V2500–ENG–72–0638 in paragraph (e)
                                                be utilized for the affected drums if a                 Information paragraph.                                of this AD.
                                                drum moves from one engine to another.                    We partially agree. We do not agree                 Request To Include a Ferry Flight
                                                  We do not agree. We evaluated use of                  with adding IAE NMSB No. V2500–
                                                drum serial numbers versus engine                       ENG–72–0638 to the Relevant Service                      UA requested that the AD be changed
                                                serial numbers and chose engine serial                  Information paragraph because that                    to allow a one-cycle ferry flight. No
                                                numbers based on the increased                          paragraph is not in the final rule. We                justification was given.
                                                complexity associated with tracking                     agree that the service information                       We do not agree. Per 14 CFR 39.23, an
                                                drum serial numbers. It was also noted                  should be included in the AD,                         AD only addresses ferry flights if they
                                                that it is more likely that an engine, as               elsewhere. We added IAE NMSB No.                      are prohibited. We did not prohibit ferry
                                                opposed to an individual used drum,                     V2500–ENG–72–0638 to the Related                      flights in this AD. We did not change
                                                would be moved. The engine groups in                    Information paragraph.                                the AD.
                                                the AD reflect the unsafe condition as it                                                                     Request Clarification of Compliance
                                                                                                        Request Clarification of Compliance
                                                exists today. If the engine distributions                                                                     Time
                                                                                                        Time
                                                change significantly in the future, we                                                                           UA commented that some grace
                                                would consider additional rulemaking.                      UA and LATAM Airlines requested
                                                                                                                                                              periods in AD 2012–09–09 are different
                                                We did not change the AD.                               clarification on the difference between
                                                                                                                                                              from the NPRM (79 FR 77411, December
                                                                                                        the AD and SB terminating actions for
                                                Request To Change Service Information                                                                         24, 2014). UA requested clarification
                                                                                                        compliance time to incorporate
                                                                                                                                                              that the older compliance times in AD
                                                   Rolls Royce plc proposed that                        terminating action. The AD requires
                                                                                                                                                              2012–09–09 are no longer applicable or
                                                revision 6 of IAE Alert NMSB No.                        accomplishment within 9,450 cycles
                                                                                                                                                              available and let ‘‘Credit for Previous
                                                V2500–ENG–72–0615 be quoted in the                      after the effective date of the AD, while
                                                                                                                                                              Actions’’ allow the longer compliance
                                                AD, and that all references to it,                      the SB requires accomplishment by
                                                                                                                                                              times of the NPRM. The clarification
                                                including engine groups affected, be                    December 31, 2021. The commenter said
                                                                                                                                                              was requested since, for compliance
                                                aligned to this latest revision. The                    shop visits were planned based on the
                                                                                                                                                              intervals that have been shortened, the
                                                justification for this request is that the              end date in the SB. The AD limit of
                                                                                                                                                              commenter can see no way to address
                                                current AD references IAE NMSB No.                      9,450 cycles will force engines off wing
                                                                                                                                                              those engines, particularly if the engine
                                                V2500–ENG–72–0615, Revision 3. This                     earlier than planned.
                                                                                                                                                              has already exceeded the shortened
                                                NMSB is now at revision 6.                                 We do not agree. The cycle limit in                interval. For intervals that have been
                                                   We do not agree because the AD                       the AD represents fleet average                       extended, inspection intervals can
                                                already references Revision 6 of IAE                    utilization up to the SB ‘accomplish by’              easily be extended to agree.
                                                Alert NMSB No.V2500–ENG–72–A0615.                       date. We did not change the AD.                          We do not agree. AD 2012–09–09 is
                                                We did not change the AD.                                                                                     being superseded by this AD; therefore,
                                                                                                        Request Clarification for Terminating
                                                Request Clarification of Material                       Action                                                the previous compliance times are
                                                Incorporated by Reference                                                                                     inapplicable after the effective date of
                                                                                                           UA requested clarification that                    this AD. This final rule allows 200
                                                   UA and Delta Airlines requested                      inspections are not required after the                cycles after the effective date of the AD
                                                clarification of whether IAE NMSB No.                   terminating action has been performed.                to perform the initial USI if the cycles
                                                V2500–ENG–72–0638 is considered                         UA suggested that this clarification was              since new threshold has been passed. If
                                                incorporated by reference. This AD will                 required because the SB Grace Periods                 the cyclic interval allowed by this AD
                                                incorporate by reference IAE Alert                      Tables include timing for any drum                    for the next USI based on the last part
                                                NMSB No. V2500–ENG 72–0615,                             fitted with non-silver nuts. It is not                inspection has been surpassed, then the
                                                Revision 6, dated September 4, 2014,                    explicit that the table does not apply to             initial inspection requirements would
                                                which refers to IAE NMSB No. V2500–                     a new drum with non-silver nuts.                      apply. This means you must inspect
                                                ENG–72–0638 for instructions on                            We do not agree. Terminating action                within 200 cycles after the effective date
                                                performing the USI. IAE NMSB No.                        means that no further action is required.             of this AD. We did not change the AD.
                                                V2500–ENG–72–0638 contains                              Therefore, the AD does not require any
                                                instructions and procedures that do not                 additional inspections after the                      Request To Change Service Information
                                                affect failure mode detection,                          terminating action has been                              UA stated that the USI procedures, as
                                                prevention or elimination of the unsafe                 accomplished. We did not change the                   defined in IAE NMSB No. V2500–ENG–
                                                condition identified in the NPRM (79                    AD.                                                   72–0638, which lift the probe off the
                                                FR 77411, December 24, 2014) and                                                                              surface of the drum, should not be
                                                                                                        Request Deletion of Service Information
                                                should not be mandated by the AD.                                                                             mandated. The USI procedures, in IAE
                                                   We agree that IAE Alert NMSB                            UA identified that IAE NMSB No.                    NMSB No. V2500–ENG–72–0638, use a
                                                No.V2500–ENG–72–0638 should not be                      V2500–ENG–72–0638, Part B paragraph                   ‘‘clamp’’ added to the USI probe to lift
                                                incorporated by reference. We changed                   (3)Y.(3) states that an engine be rejected            the probe off of the drum. This
                                                the AD to remove the requirement to use                 if staining and/or cracking of the                    procedure relies on couplant to fill the
                                                IAE NMSB No. V2500–ENG–72–0638.                         ceramic liner is found. This requirement              gaps to the drum and any missing drum
                                                We also added a new paragraph (g) to                    should not be mandated because this                   coatings. UA is not confident that
                                                this AD that provides specific                          concern was addressed in AD 2012–09–                  accurate measurements can be
                                                information from IAE NMSB No.                           09 which was superseded. The FAA                      consistently achieved using this
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                                                V2500–ENG–72–0638 to perform the                        agreed that there was not clear                       procedure, especially in areas that have
                                                USI.                                                    acceptance criteria to mandate engine                 been repaired.
                                                                                                        rejection based on staining and axial                    We partially agree. We agree that the
                                                Request Change to Relevant Service                      cracking of the HPC stage 7 to 8 drum                 USI procedures in IAE NMSB No.
                                                Information                                             ceramic liner.                                        V2500–ENG–72–0638, and those
                                                  UA and Delta Airlines requested that                     We agree. We changed this final rule               referenced in superseded AD 2012–09–
                                                IAE NMSB No. V2500–ENG–72–0638 be                       by deleting reference to IAE NMSB No.                 09, are valid methods of inspection. We


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                                                                 Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations                                         30141

                                                disagree that the procedure in IAE                      Request To Change Terminating Action                  Previous Actions’’ paragraph because
                                                NMSB No. V2500–ENG–72–0638 would                           Wizz Air, Lufthansa, and Delta                     these SB revisions do not require
                                                not provide accurate measurements. We                   Airlines requested the compliance time                complete inspection of the drum
                                                changed this AD by removing IAE                         for terminating action be changed from                circumference in areas of liner loss.
                                                NMSB No. V2500–ENG–72–0638 and                          ‘‘9,450 FC after the effective date of the            Incomplete inspections are not effective
                                                adding a paragraph that provides                        AD’’ to ‘‘at next piece-part exposure.’’              at detecting cracks and compromises
                                                specific information to perform the USI.                This will eliminate extra shop visits                 safety.
                                                                                                                                                                 We agree. We removed IAE NMSB No.
                                                Request To Change Service Information                   solely for drum replacement.
                                                                                                           We do not agree. This change would                 V2500–ENG–72–0594, IAE NMSB No.
                                                   Jetstar Group Airways requested that                 significantly increase the need for spare             V2500–ENG–72–0603, IAE NMSB No.
                                                allowance for future SB revisions be                    parts in the near term, which cannot be               V2500–ENG–72–0608, Revision 2 and
                                                included in the AD.                                     supported by industry at this time. We                earlier, and IAE NMSB No.V2500–ENG–
                                                                                                        did not change the AD.                                72–A0615, Revision 2 and earlier, from
                                                   We do not agree. We cannot mandate                                                                         the Credit for Previous Actions
                                                documents which do not yet exist. We                    Request To Change Compliance                          paragraph.
                                                did not change the AD.
                                                                                                          IAE requested that the Compliance                   Request To Simplify Compliance
                                                Request To Change the Applicability                     phrase ‘‘If cracks are found . . .’’ be
                                                                                                                                                                 Delta Airlines commented that the
                                                                                                        changed to ‘‘if crack indications or
                                                   Jetstar Group Airways requested that                                                                       compliance plan as proposed in the
                                                                                                        inspection rejections are found . . .’’.
                                                the applicability for V2500–A5 engines                                                                        NPRM (79 FR 77411, December 24,
                                                                                                        The reason for this request is that FPI,
                                                be revised to exclude Engine Serial                                                                           2014), is too complicated. Delta said
                                                                                                        USI, and ECI only indicate a crack may
                                                Number (ESN) V16660 and higher as the                                                                         that it requires: (1) Knowledge of where
                                                                                                        be present. Cracks typically can only be
                                                introduction of the terminating action                                                                        the HPC 3-8 drum(s) have operated by
                                                                                                        confirmed via lab destructive testing.
                                                configuration began with ESN V16660                       We do not agree. If a part fails the                flight number for the V2500–A1 and
                                                based on the applicability of IAE SB                    inspection it is assumed to be cracked.               V2500–A5 engine models; (2) tracking
                                                V2500–ENG–72–0632 that introduced                       No additional testing is requested or                 the inspections performed at shop level
                                                silver free nuts.                                       required to prove a crack exists. We did              for the HPC 3-8 drum(s); (3) tracking the
                                                   We do not agree. The AD applicability                not change the AD.                                    HPC module assembly for the 3-8
                                                is correct. The applicability defined in                                                                      drum(s) installed and the configuration
                                                IAE SB V2500–ENG–72–0632 does not                       Request To Change Compliance                          at the last shop visit of the HPC module;
                                                reflect actual part installations. We did                  IAE and MTU requested that ‘‘cycles                and (4) operators to trace documents of
                                                not change the AD.                                      since new’’ (CSN) refer to cycles on the              HPC 3-8 drum(s) that exchanged
                                                                                                        specific drum and not engine cycles                   between HPC modules and from other
                                                Request To Allow Repetitive                                                                                   operators. Without those trace
                                                                                                        since new. If drums are replaced, there
                                                Inspections                                                                                                   documents, operators will be forced to
                                                                                                        could be confusion on when a part must
                                                   Lufthansa, Jetstar Group Airways,                    be inspected.                                         obtain new HPC 3-8 drum(s) to prevent
                                                Wizz Air, and MTU Maintenance (MTU)                        We agree. We changed paragraphs                    recontamination of their respective
                                                requested to remove ‘‘within 9,450                      (e)(1) through (e)(5) from ‘‘within 200               fleets.
                                                                                                        cycles of accumulating xxxx CSN’’ to                     We do not agree. The changes we
                                                cycles after the effective date of the AD’’
                                                                                                        ‘‘within 200 cycles of the drum                       proposed in this AD, expanding the
                                                for terminating action and allow
                                                                                                        accumulating xxxx cycles.’’                           population, changing the inspection
                                                unlimited USI. The commenters pointed
                                                                                                                                                              interval, etc., are not complex changes
                                                out that the unsafe condition results                   Request To Change Compliance Time                     to the compliance program. We also
                                                from a corrosive operating environment,
                                                                                                           IAE and MTU requested an end date                  evaluated the original compliance
                                                and the amount of corrosion varies with
                                                                                                        of December 31, 2025 be added to the                  program requirements. We did not
                                                time and location. The commenters also
                                                                                                        compliance time in addition to the                    conclude that they were so complex that
                                                pointed to the lack of data to support a
                                                                                                        existing cycle limit. This request was                operators would find them difficult to
                                                calendar end date of 2021, and that the
                                                                                                        justified because low utilization                     understand, particularly since the
                                                hard time for part removals will drive
                                                                                                        operators will not be required to                     information needed to comply with the
                                                younger parts off wing early, with no
                                                                                                        upgrade their engines until well beyond               AD is available in operator records. We
                                                additional benefits to safety. Finally, the
                                                                                                        2040 with only the cycle limit. IAE is                did not change the AD.
                                                commenters offered that if the USI and
                                                                                                        concerned that after the larger operators
                                                the ECI provide sufficient safety against                                                     Request Clarification of Service
                                                                                                        have completed the upgrades to their
                                                an uncontained failure, this should also                                                      Information
                                                                                                        fleets, the expertise and equipment
                                                be the case after 9,450 flight cycles (FC).                                                     Delta Airlines stated that IAE Alert
                                                                                                        required to perform the required
                                                Additionally, the overall risk in the fleet                                                   NMSB No. V2500–ENG–72–A0615,
                                                                                                        inspections will no longer be available.
                                                will decrease due to the number of                         We agree. We changed the Mandatory Revision 6, has lists of engine models
                                                planned shop visits.                                    Terminating Action paragraph to       and drum part numbers. The SB lists
                                                   We do not agree. The ongoing                         include an end date of December 31,   drum part numbers as associated with
                                                repetitive inspections do not provide                   2025.                                 the V2500–D5 engine that are not
                                                sufficient safety by themselves and are                                                       approved for installation on the V2500–
                                                considered interim actions. The                         Request Change To Credit for Previous D5 engine. The SB could be
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                                                previous ADs did not include an end                     Actions Paragraph                     misinterpreted as allowing use of part
                                                date because no terminating action was                    IAE requested that IAE NMSBs No.    numbers on the V2500–D5 engine
                                                available. This AD includes mandatory                   V2500–ENG–72–0594, No. V2500–ENG– model that have not actually been
                                                terminating action that completely                      72–0603, No. V2500–ENG–72–0608,       approved for use.
                                                removes the noted unsafe condition and                  Revision 2 and earlier, and No.V2500–   We do not agree. The SB separates
                                                restores an acceptable level of safety.                 ENG–72–0615, Revision 2 and earlier,  engine applicability into six groups. The
                                                We did not change the AD.                               be removed from the ‘‘Credit for      drum part numbers listed for each group


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                                                30142            Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations

                                                represent the possible drum part                          • Do not add any additional burden                  Executive Order 13132. This AD will
                                                numbers for all the noted engine models                 upon the public than was already                      not have a substantial direct effect on
                                                listed in the group. These groupings do                 proposed in the NPRM (79 FR 77411,                    the States, on the relationship between
                                                not otherwise indicate that part                        December 24, 2014).                                   the national government and the States,
                                                numbers are interchangeable among the                     We also determined that these                       or on the distribution of power and
                                                engine models. The groups that include                  changes will not increase the economic                responsibilities among the various
                                                V2500–D5 (Group E and group F) also                     burden on any operator or increase the                levels of government.
                                                include other engine models. We did                     scope of this AD.                                       For the reasons discussed above, I
                                                not change the AD.                                                                                            certify that this AD:
                                                                                                        Related Service Information Under 1
                                                                                                                                                                (1) Is not a ‘‘significant regulatory
                                                Request Clarification of Mandatory                      CFR Part 51
                                                                                                                                                              action’’ under Executive Order 12866,
                                                Terminating Action Paragraph                              International Aero Engines Alert                      (2) Is not a ‘‘significant rule’’ under
                                                   Lufthansa requested clarification of                 NMSB No. V2500–ENG–72–A0615,                          DOT Regulatory Policies and Procedures
                                                the Mandatory Terminating Action                        Revision 6, dated September 4, 2014.                  (44 FR 11034, February 26, 1979),
                                                paragraph. The commenter stated that                    The NMSB describes procedures for                       (3) Will not affect intrastate aviation
                                                the paragraph directing the installation                inspecting the engine front support                   in Alaska to the extent that it justifies
                                                of HPC stage 3 to 8 drum is not clear if                pins. This service information is                     making a regulatory distinction, and
                                                the mandatory terminating action is                     reasonably available because the                        (4) Will not have a significant
                                                meant to be a hard-time limit which                     interested parties have access to it                  economic impact, positive or negative,
                                                requires removal of drums from service                  through their normal course of business               on a substantial number of small entities
                                                by means of a shop visit. The                           or by the means identified in the                     under the criteria of the Regulatory
                                                commenter suggested that the                            ADDRESSES section of this AD.                         Flexibility Act.
                                                terminating action for drum                             Costs of Compliance                                   List of Subjects in 14 CFR Part 39
                                                replacement may be substituted by an
                                                on-wing USI. On-wing USI could occur                       We estimate that this AD will affect                 Air transportation, Aircraft, Aviation
                                                after 9,450 FC from the effective date of               956 engines installed on airplanes of                 safety, Incorporation by reference,
                                                this AD until the engine has a shop                     U.S. registry. We estimate that it will               Safety.
                                                visit.                                                  take about 3 hours per engine to perform
                                                                                                        the USI and about 2 hours per engine to               Adoption of the Amendment
                                                   We do not agree. The mandatory
                                                                                                        perform the FPI or ECI of the HPC stage                 Accordingly, under the authority
                                                terminating action has a hard-time limit
                                                                                                        3 to 8 drum. We also estimate that                    delegated to me by the Administrator,
                                                of 9,450 FC after the effective date of
                                                                                                        removing silver residue from the HPC                  the FAA amends 14 CFR part 39 as
                                                this AD. The terminating actions must
                                                                                                        stage 3 to 8 drum will cost about $2,600              follows:
                                                be performed within this time. The AD
                                                                                                        per engine and a set of silver free nuts
                                                does not give allowance to perform                                                                            PART 39—AIRWORTHINESS
                                                                                                        will cost about $1,060 per engine. We
                                                inspections in place of performing the                                                                        DIRECTIVES
                                                                                                        estimate the pro-rated replacement cost
                                                terminating actions. We did not change
                                                                                                        to replace an HPC stage 3 to 8 drum to
                                                the AD.                                                                                                       ■ 1. The authority citation for part 39
                                                                                                        be $52,014. Based on these figures, we
                                                Request To Revise Mandatory                             estimate the cost of this AD on U.S.                  continues to read as follows:
                                                Terminating Action                                      operators to be $53,630,644.                              Authority: 49 U.S.C. 106(g), 40113, 44701.
                                                   MTU requested that the mandatory                     Authority for This Rulemaking                         § 39.13    [Amended]
                                                terminating action be delayed based on                     Title 49 of the United States Code                 ■ 2. The FAA amends § 39.13 by
                                                the appropriate inspection grace period                 specifies the FAA’s authority to issue                removing Airworthiness Directive (AD)
                                                listed in the service information. The                  rules on aviation safety. Subtitle I,                 2012–09–09, Amendment 39–17044 (77
                                                grace period extension would eliminate                  Section 106, describes the authority of               FR 30371, May 23, 2012), and adding
                                                extra shop visits for only drum                         the FAA Administrator. Subtitle VII,                  the following new AD:
                                                replacement.                                            Aviation Programs, describes in more
                                                   We do not agree. The cyclic intervals                                                                      2015–10–04 International Aero Engines
                                                                                                        detail the scope of the Agency’s                          AG: Amendment 39–18159 Docket No.
                                                listed in the service information, based                authority.                                                FAA–2009–1100; Directorate Identifier
                                                on piece-part inspection, apply to the                     We are issuing this rulemaking under                   2009–NE–37–AD.
                                                threshold for performing the next USI.                  the authority described in Subtitle VII,
                                                The compliance time for completing the                                                                        (a) Effective Date
                                                                                                        Part A, Subpart III, Section 44701,
                                                terminating actions is not related to                   ‘‘General requirements.’’ Under that                    This AD is effective July 1, 2015.
                                                when or what inspections were                           section, Congress charges the FAA with                (b) Affected ADs
                                                performed. We did not change the AD.                    promoting safe flight of civil aircraft in              This AD replaces AD 2012–09–09,
                                                Conclusion                                              air commerce by prescribing regulations               Amendment 39–17044 (77 FR 30371, May 23,
                                                                                                        for practices, methods, and procedures                2012).
                                                  We reviewed the relevant data,                        the Administrator finds necessary for
                                                considered the comments received, and                                                                         (c) Applicability
                                                                                                        safety in air commerce. This regulation
                                                determined that air safety and the                      is within the scope of that authority                    This AD applies to:
                                                public interest require adopting this AD                because it addresses an unsafe condition                 (1) All International Aero Engines AG (IAE)
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                                                with the changes described previously.                                                                        V2500–A1 turbofan engines; and
                                                                                                        that is likely to exist or develop on                    (2) All IAE V2525–D5 and V2528–D5
                                                We have determined that these minor                     products identified in this rulemaking                turbofan engines; and
                                                changes:                                                action.                                                  (3) IAE V2522–A5, V2524–A5, V2527–A5,
                                                  • Are consistent with the intent that                                                                       V2527E–A5, V2527M–A5, V2530–A5, and
                                                was proposed in the NPRM (79 FR                         Regulatory Findings
                                                                                                                                                              V2533–A5 turbofan engines with serial
                                                77411, December 24, 2014) for                             We have determined that this AD will                numbers (S/Ns) V10001 through V13190, and
                                                correcting the unsafe condition; and                    not have federalism implications under                V15001 through V16728, excluding V16707.



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                                                                 Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations                                               30143

                                                (d) Unsafe Condition                                    (5) Initial USI of the HPC Stage 3 to 8                  (vi) For outer diameter inspection, set Gate
                                                  This AD was prompted by the discovery                 Drum—Group ‘‘F’’                                      Position to 3.5–7.0 time base position based
                                                                                                           For IAE V2500–A1, –A5, and –D5 turbofan            on ten division time base.
                                                that additional attachment nuts for certain
                                                                                                        engines not listed in ‘‘Group A,’’ ‘‘Group B,’’          (vii) For inner diameter inspection, set
                                                high-pressure compressor (HPC) stage 3 to 8                                                                   Gate Position to 3.0–8.0 time base position
                                                drums cause the drum to corrode and crack.              ‘‘Group C,’’ or ‘‘Group D,’’ and with drum
                                                                                                        assembly P/Ns listed in ‘‘Group F’’ in                based on ten division time base.
                                                We are issuing this AD to prevent failure of                                                                     (2) Inspect the HPC stage 3 to 8 drum using
                                                                                                        paragraph 1.E. in IAE Alert NMSB No.
                                                the HPC stage 3 to 8 drum, which could                                                                        the acceptance criteria listed in paragraph
                                                                                                        V2500–ENG–72–A0615, Revision 6, dated
                                                result in uncontained drum failure, damage                                                                    3.A.(1)(a) of IAE Alert NMSB No. V2500–
                                                                                                        September 4, 2014, perform an initial USI of
                                                to the engine, and damage to the airplane.              the HPC stage 3 to 8 drum within 200 cycles           ENG–72–A0615, Revision 6, dated September
                                                                                                        of the drum accumulating 9,000 cycles or              4, 2014.
                                                (e) Compliance
                                                                                                        within 200 cycles from the effective date of             (3) After completing the inspection of each
                                                   Comply with this AD within the                       this AD, whichever occurs later.                      feature, verify the calibration of the
                                                compliance times specified, unless already                                                                    ultrasonic equipment. If the calibration is
                                                done. You may use the inspections listed in             (f) Repetitive USIs of the HPC Stage 3 to 8           under sensitivity by more than 3db, then
                                                paragraph (h)(3) of this AD instead of an               Drum                                                  repeat the calibration and inspection of the
                                                ultrasonic inspection (USI) for the initial                (1) For engines included in ‘‘Group A,’’           feature.
                                                inspection required by paragraphs (e)(1)                ‘‘Group B,’’ ‘‘Group C,’’ ‘‘Group E,’’ or             (h) Removal of Silver-Plated Nuts
                                                through (e)(5). If cracks are found during any          ‘‘Group F,’’ as defined in paragraph (e) of this
                                                                                                        AD, perform repetitive USIs of the HPC stage             At the next piece-part exposure of the HPC
                                                of the inspections required by this AD,
                                                                                                        3 to 8 drum within every 750 cycles of the            stage 3 to 8 drum after the effective date of
                                                remove the drum from service before further                                                                   this AD, do the following before returning
                                                                                                        last USI after the initial inspection required
                                                flight.                                                                                                       any HPC stage 3 to 8 drum to service:
                                                                                                        by paragraph (e) of this AD.
                                                (1) Initial USI of the HPC Stage 3 to 8                    (2) For engines included in ‘‘Group D,’’ as           (1) Remove from service all silver-plated
                                                Drum—Group ‘‘A’’ and Group ‘‘B’’                        defined in paragraph (e) of this AD, perform          nuts (fully or partially-plated), P/Ns AS44862
                                                                                                        repetitive USIs of the HPC stage 3 to 8 drum          or AS64367, that attach the HPC stage 3 to
                                                   For IAE V2500–A1 turbofan engines with                                                                     8 drum to the HPC stage 9 to 12 drum.
                                                                                                        within every 500 cycles of the last USI after
                                                S/Ns listed in ‘‘Group A’’ or ‘‘Group B’’ in            the initial inspection required by paragraph             (2) Clean the HPC stage 3 to 8 drum to
                                                paragraph 1.E. in IAE Alert Non-Mandatory               (e) of this AD.                                       remove the silver residue.
                                                Service Bulletin (NMSB) No. V2500–ENG–                     (3) If you inspect the HPC stage 3 to 8 drum          (3) Inspect the HPC stage 3 to 8 drum using
                                                72–A0615, Revision 6, dated September 4,                at piece-part exposure, you may delay the             at least one of the following methods:
                                                2014, perform an initial USI of the HPC stage           next USI as shown in the ‘‘Grace Periods                 (i) Fluorescent penetrant inspection (FPI)
                                                3 to 8 drum within 200 cycles of the drum               Table’’ for each compliance group listed in           of the HPC stage 3 to 8 drum for cracks, or
                                                accumulating 8,000 cycles or within 200                 paragraph 1.E. in IAE Alert NMSB No.                     (ii) Eddy current inspection (ECI) of the
                                                cycles from the effective date of this AD,              V2500–ENG–72–A0615, Revision 6, dated                 HPC stage 3 to 8 drum for cracks.
                                                whichever occurs later.                                 September 4, 2014.
                                                                                                                                                              (i) Installation Prohibition
                                                (2) Initial USI of the HPC Stage 3 to 8                 (g) USI Procedure for the Inspection of the              After the effective date of this AD, do not
                                                Drum—Group ‘‘C’’                                        HPC Stage 3 to 8 Drum                                 install any silver-plated nuts, P/N AS44862
                                                  For IAE V2500–A5 turbofan engines with                   For the USI inspections required by this           or AS64367, into any engine.
                                                S/Ns listed in ‘‘Group C’’ in paragraph 1.E.            AD, do the following. Inspect the stage 8 disk
                                                                                                        of the HPC stage 3 to 8 drum on the outer             (j) Mandatory Terminating Action
                                                in IAE Alert NMSB No. V2500–ENG–72–
                                                                                                        diameter adjacent to the stage 7 to 8 electron           Within 9,450 cycles after the effective date
                                                A0615, Revision 6, dated September 4, 2014,                                                                   of this AD, but not later than December 31,
                                                                                                        beam weld land using ultrasonic probe
                                                perform an initial USI of the HPC stage 3 to            manipulator assembly P/N IAE2R19865 for               2025, install:
                                                8 drum within 200 cycles of the drum                    IAE V2500–A1 engines, P/N IAE2R19852 or                  (1) An HPC stage 3 to 8 drum that has
                                                accumulating 6,250 cycles or within 200                 IAE2R19879 for IAE V2500–A5 engines, and              never operated with silver-plated nuts (fully
                                                cycles from the effective date of this AD,              P/N IAE2R19874 for IAE V2500–D5 engines.              or partially plated) to attach the HPC stage 3
                                                whichever occurs later.                                 Inspect the stage 8 disk of the HPC stage 3           to 8 drum to the HPC stage 9 to 12 drum,
                                                                                                        to 8 drum on the inner diameter at the inner          with
                                                (3) Initial USI of the HPC Stage 3 to 8
                                                                                                        radius position using ultrasonic probe                   (2) silver-free nuts to attach the HPC stage
                                                Drum—Group ‘‘D’’
                                                                                                        manipulator assembly P/N IAE2R19870 for               3 to 8 drum to the HPC stage 9 to 12 drum.
                                                  For IAE V2500–A5 turbofan engines with                IAE V2500–A1 engines, P/N IAE2R19859 or
                                                S/Ns listed in ‘‘Group D’’ in paragraph 1.E.            IAE2R19880 for IAE V2500–A5 engines, and              (k) Definition
                                                in IAE Alert NMSB No. V2500–ENG–72–                     P/N IAE2R19876 for IAE V2500–D5 engines.                 For the purpose of this AD, ‘‘piece-part
                                                A0615, Revision 6, dated September 4, 2014,             Inspect the full circumference of both the            exposure’’ is removal of the HPC stage 3 to
                                                perform an initial USI of the HPC stage 3 to            inner and outer diameters. If the entire              8 drum from the engine, removal of all blades
                                                8 drum within 200 cycles of the drum                    circumference cannot be inspected, remove             from the drum, and separation of the HPC
                                                accumulating 3,750 cycles or within 200                 the drum from the engine before further               stage 3 to 8 drum from the stage 9 to 12
                                                cycles from the effective date of this AD,              flight.                                               drum.
                                                whichever occurs later.                                    (1) Calibrate the ultrasonic equipment
                                                                                                                                                              (l) Credit for Previous Actions
                                                                                                        using the following parameters and the
                                                (4) Initial USI of the HPC Stage 3 to 8                 acceptance criteria listed in paragraph                  If you performed an inspection of the HPC
                                                Drum—Group ‘‘E’’                                        3.A.(1)(a) of IAE Alert NMSB No. V2500–               stage 3 to 8 drum before the effective date of
                                                                                                        ENG–72–A0615, Revision 6, dated September             this AD using one of the following IAE
                                                   For IAE V2500–A1, –A5, and –D5 turbofan
                                                                                                        4, 2014. Use working standard P/N                     NMSBs, you met the initial inspection
                                                engines not listed in ‘‘Group A,’’ ‘‘Group B,’’                                                               requirement of paragraph (e) of this AD:
                                                                                                        IAE2R19854 for outer diameter inspection
                                                ‘‘Group C,’’ or ‘‘Group D,’’ and with drum                                                                       (i) IAE NMSB No. V2500–ENG–72–0608,
                                                                                                        and working standard P/N IAE2R19860 for
                                                assembly part numbers (P/Ns) listed in                  inner diameter inspection:                            Revision 3, dated September 20, 2011.
                                                ‘‘Group E’’ in paragraph 1.E. in IAE Alert
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                                                                                                           (i) Set Frequency to 5 Mhz.                           (ii) IAE NMSB No. V2500–ENG–72–0615,
                                                NMSB No. V2500–ENG–72–A0615, Revision                      (ii) Set Rectify to Full Wave.                     Revision 3, dated September 20, 2011; IAE
                                                6, dated September 4, 2014, perform an                     (iii) Set Pulser to Single Crystal.                Alert NMSB No. V2500–ENG–72–0615,
                                                initial USI of the HPC stage 3 to 8 drum                   (iv) Maximize the signal response to               Revision 4, dated May 2, 2013; and IAE Alert
                                                within 200 cycles of the drum accumulating              achieve 70 percent full screen height.                NMSB No. V2500–ENG–72–0615, Revision 5,
                                                12,500 cycles or within 200 cycles from the                (v) Adjust the range control to position the       dated August 5, 2014.
                                                effective date of this AD, whichever occurs             target signal at 5.0 time base position based            (iii) IAE NMSB No. V2500–ENG–72–0638,
                                                later.                                                  on ten division time base.                            dated April 11, 2013.



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                                                30144            Federal Register / Vol. 80, No. 101 / Wednesday, May 27, 2015 / Rules and Regulations

                                                (m) Alternative Methods of Compliance                     Issued in Burlington, Massachusetts, on             maximum DBC amounts be adjusted to
                                                (AMOCs)                                                 April 30, 2015.                                       reflect changes in the Consumer Price
                                                  The Manager, Engine Certification Office,             Colleen M. D’Alessandro,                              Index for All Urban Consumers (CPI–U).
                                                FAA, may approve AMOCs for this AD. Use                 Assistant Directorate Manager, Engine &               Under 14 CFR 250.5(e), the review of
                                                the procedures found in 14 CFR 39.19 to                 Propeller Directorate, Aircraft Certification         denied boarding compensation was to
                                                make your request. You may email your                   Service.                                              take place every 2 years, with the first
                                                request to: ANE-AD-AMOC@faa.gov.                        [FR Doc. 2015–12068 Filed 5–26–15; 8:45 am]           such review occurring in July 2012, to
                                                                                                        BILLING CODE 4910–13–P                                coincide with our review of the baggage
                                                (n) Related Information                                                                                       liability amount. Section 250.5(e)
                                                  (1) For more information about this AD,                                                                     prescribes the use of a specific formula
                                                contact Martin Adler, Aerospace Engineer,               DEPARTMENT OF TRANSPORTATION                          to calculate the revised maximum DBC
                                                Engine Certification Office, FAA, Engine &                                                                    amounts when making these periodic
                                                Propeller Directorate, 12 New England                   Office of the Secretary                               adjustments. The formula is below.
                                                Executive Park, Burlington, MA 01803;                                                                         Current DBC limit in section 250.5(a)(2)
                                                phone: 781–238–7157; fax: 781–238–7199;                 14 CFR Parts 250, 254 and 383                              multiplied by (a/b) rounded to the
                                                email: martin.adler@faa.gov.                            [Docket DOT–OST–2015–0104]                                 nearest $25
                                                  (2) IAE NMSB No. V2500–ENG–72–0638,                                                                         where:
                                                dated April 11, 2013; IAE NMSB No. V2500–               RIN 2105–AE39
                                                                                                                                                              a = July CPI–U of year of current adjustment
                                                ENG–72–0637, dated May 2, 2013; IAE                                                                           b = the CPI–U figure in August 2011 when
                                                NMSB No. V2500–ENG–72–0625, dated                       Revisions to Denied Boarding                               the inflation adjustment provision was
                                                October 8, 2014; IAE EM Task 72–41–11–                  Compensation, Domestic Baggage                             added to Part 250
                                                200–001; and IAE EM Task 72–41–11–110–                  Liability Limits, and Civil Penalty
                                                                                                        Amounts                                               Section 250.5(e) specifies that the DBC
                                                001, which are not incorporated by reference                                                                  limit in section 250.5(a)(3) shall be
                                                in this AD, can be obtained from IAE, using             AGENCY:  Office of the Secretary (OST),               twice the revised limit for section
                                                the contact information in paragraph (o)(3) of          Department of Transportation (DOT).                   250.5(a)(2).
                                                this AD. IAE NMSB No. V2500–ENG–72–                                                                             We reviewed the compensation
                                                                                                        ACTION: Final rule.
                                                0638, dated April 11, 2013 provides guidance                                                                  amounts in 2012 and found that
                                                on performing the USI. IAE NMSB No.                     SUMMARY:   In accordance with existing                according to the formula set out in
                                                V2500–ENG–72–0637 and IAE EM Task 72–                   regulations, this final rule raises the               section 250.5(e), no change in the DBC
                                                41–11–200–001 provide guidance on                       maximum denied boarding                               amounts was called for. However, the
                                                performing the FPI. Guidance on performing              compensation (DBC) amounts that have                  2014–2015 review indicated that an
                                                the ECI can be found in IAE NMSB No.                                                                          inflation adjustment is required.
                                                                                                        been in effect since August 2011, raising
                                                V2500–ENG–72–0625. IAE Engine Manual                                                                          Applying the formula to consumer price
                                                                                                        the maximum DBC amounts from the
                                                Task 72–41–11–110–001 provides guidance                                                                       index changes occurring between
                                                                                                        current figures of $650/$1,300 to $675/
                                                on cleaning the HPC stage 3 to 8 drum.                                                                        August 2011 (the basis month required
                                                                                                        $1,350. Also, in accordance with
                                                (o) Material Incorporated by Reference                  existing regulations, this final rule raises          by the formula) and July 2014,1 the
                                                   (1) The Director of the Federal Register             the minimum liability limit air carriers              appropriate inflation adjustment is $650
                                                approved the incorporation by reference                 may impose for mishandled baggage in                  × 238.250/226.545 [$650 × 1.0517],
                                                (IBR) of the service information listed in this         domestic air transportation, adjusting                which yields $683.60. (The base amount
                                                paragraph under 5 U.S.C. 552(a) and 1 CFR               the minimum limit of liability from the               of $650 in the formula was the
                                                part 51.                                                current amount of $3,400 to $3,500. To                maximum denied boarding
                                                   (2) You must use this service information            account for inflation, this rule also                 compensation in section 250.5(a)(2) 2 at
                                                as applicable to do the actions required by             raises the maximum civil penalties that               the time that this biennial indexing
                                                this AD, unless the AD specifies otherwise.             can be assessed as a result of DOT                    provision was added to the rule,
                                                   (i) International Aero Engines Alert Non-            aviation enforcement actions for                      238.250 was the CPI–U for July 2014,
                                                Modification Service Bulletin No. V2500–                violations of certain economic                        and 226.545 was the CPI–U for August
                                                ENG–72–A0615, Revision 6, dated September               provisions of Title 49 of the U.S. Code               2011.) Section 250.5(e) requires us to
                                                4, 2014.                                                from $2,500 to $2,750.                                round the adjustment to the nearest $25,
                                                   (ii) Reserved.                                       DATES: This rule is effective on August
                                                                                                                                                              or to $675 in this case. Section
                                                   (3) For IAE service information identified           25, 2015.                                             250.5(a)(3) provides that for passengers
                                                in this AD, contact International Aero                                                                        who are not rerouted to reach their
                                                                                                        FOR FURTHER INFORMATION CONTACT:
                                                Engines AG, 400 Main Street, East Hartford,                                                                   destination within two hours the
                                                                                                        Clereece Kroha, Senior Attorney, Office               maximum DBC amount is twice the
                                                CT 06118; phone: 860–368–3700; fax: 860–                of the General Counsel, Department of
                                                368–4600; email: iaeinfo@iaev2500.com;
                                                                                                        Transportation, 1200 New Jersey Ave.                     1 The next review of the denied boarding
                                                Internet: https://www.iaeworld.com.
                                                                                                        SE., Washington, DC 20590; 202–366–                   compensation amounts will occur after the CPI–U
                                                   (4) You may view this service information
                                                                                                        9041, clereece.kroha@dot.gov.                         for July 2016 is released.
                                                at the FAA, Engine & Propeller Directorate,                                                                      2 14 CFR 250.5(a)(2) provides that the maximum
                                                12 New England Executive Park, Burlington,              SUPPLEMENTARY INFORMATION:
                                                                                                                                                              amount of DBC is $650 for passengers who are
                                                MA. For information on the availability of              I. Revision of Maximum Denied                         denied boarding involuntarily on a domestic flight
                                                this material at the FAA, call 781–238–7125.                                                                  by a carrier who offers alternate transportation that
                                                                                                        Boarding Compensation Amounts                         is planned to arrive at the passenger’s first stopover
                                                   (5) You may view this service information
                                                                                                          In its rule ‘‘Enhancing Airline                     or final destination more than one hour but less
                                                at the National Archives and Records
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                                                                                                                                                              than two hours after the planned arrival time of the
                                                Administration (NARA). For information on               Passenger Protections’’ (76 FR 23110,                 passenger’s original flight. 14 CFR 250.5(a)(3)
                                                the availability of this material at NARA, call         Apr. 25, 2011), the Department raised                 provides that the maximum amount of DBC is
                                                202–741–6030, or go to: http://                         the limits on denied boarding                         $1,300 for passengers who are denied boarding
                                                                                                        compensation (DBC) due to passengers                  involuntarily on a domestic flight by a carrier who
                                                www.archives.gov/federal-register/cfr/ibr-                                                                    offers alternate transportation that is planned to
                                                locations.html.                                         from the previous amounts of $400/$800                arrive at the passenger’s first stopover or final
                                                                                                        to the current amounts of $650/$1,300.                destination more than two hours after the planned
                                                                                                        The rule also requires that these                     arrival time of the passenger’s original flight.



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Document Created: 2015-12-15 15:36:09
Document Modified: 2015-12-15 15:36:09
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionRules and Regulations
ActionFinal rule.
DatesThis AD is effective July 1, 2015.
ContactMartin Adler, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7157; fax: 781-238-7199; email: [email protected]
FR Citation80 FR 30138 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

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