83_FR_17825 83 FR 17746 - Airworthiness Directives; Rolls-Royce plc Turbofan Engines

83 FR 17746 - Airworthiness Directives; Rolls-Royce plc Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 83, Issue 79 (April 24, 2018)

Page Range17746-17749
FR Document2018-08602

We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) Trent 1000-A2, Trent 1000-AE2, Trent 1000-C2, Trent 1000-CE2, Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 turbofan engines. This AD requires initial and repetitive inspections of the intermediate-pressure compressor (IPC) stage 1 rotor blades, IPC stage 2 rotor blades, and IPC shaft stage 2 dovetail posts, and removing any cracked parts from service. This AD was prompted by IPC blade separations resulting in engine failures. We are issuing this AD to address the unsafe condition on these products.

Federal Register, Volume 83 Issue 79 (Tuesday, April 24, 2018) 
[Federal Register Volume 83, Number 79 (Tuesday, April 24, 2018)]
[Rules and Regulations]
[Pages 17746-17749]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-08602]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0314; Product Identifier 2018-NE-11-AD; Amendment 
39-19255; AD 2018-08-02]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce plc Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

-----------------------------------------------------------------------

SUMMARY: We are adopting a new airworthiness directive (AD) for all 
Rolls-Royce plc (RR) Trent 1000-A2, Trent 1000-AE2, Trent 1000-C2, 
Trent 1000-CE2, Trent 1000-D2, Trent 1000-E2, Trent 1000-G2, Trent 
1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 turbofan 
engines. This AD requires initial and repetitive inspections of the 
intermediate-pressure compressor (IPC) stage 1 rotor blades, IPC stage 
2 rotor blades, and IPC shaft stage 2 dovetail posts, and removing any 
cracked parts from service. This AD was prompted by IPC blade 
separations resulting in engine failures. We are issuing this AD to 
address the unsafe condition on these products.

DATES: This AD is effective April 24, 2018.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of April 24, 
2018.
    We must receive comments on this AD by June 8, 2018.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For service information identified in this final rule, contact 
Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, England, 
DE24 8BJ; phone: 011-44-1332-242424; fax: 011-44-1332-249936; email: 
royce.com">corporate.care@rolls-royce.com. Internet: https://customers.rolls-royce.com/public/rollsroycecare. You may view this service information 
at the FAA, Engine & Propeller Standards Branch, 1200 District Avenue, 
Burlington, MA 01803. For information on the availability of this 
material at the FAA, call 781-238-7759. It is also available on the 
internet at http://www.regulations.gov by searching for and locating 
Docket No. FAA-2018-0314.

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-2018-
0314; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this final rule, the mandatory continuing airworthiness information 
(MCAI), the regulatory evaluation, any comments received, and other 
information. The street address for Docket Operations (phone: 800-647-
5527) is listed above. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Kevin M. Clark, Aerospace Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
781-238-7088; fax: 781-238-7199; email: [email protected].

[[Page 17747]]


SUPPLEMENTARY INFORMATION:

Discussion

    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Community, has issued EASA 
AD 2018-0084, dated April 13, 2018 (referred to after this as the 
MCAI), to address an unsafe condition for the specified products. The 
MCAI states:

    Occurrences were reported on RR Trent 1000 `Pack C' engines, 
where some IPC Rotor 1 and Rotor 2 blades were found cracked.
    This condition, if not detected and corrected, could lead to in-
flight blade release, possibly resulting in reduced control of the 
aeroplane.
    To address this potential unsafe condition, RR initially issued 
Alert NMSB TRENT 1000 72-AJ814 and 72-AJ819 to provide inspection 
instructions for IPC Rotor 1 blades, and IPC Rotor 2 blades and IPC 
shaft Stage 2 dovetail posts, respectively. RR also issued NMSB 
TRENT 1000 72-J871 to provide rework instructions for the affected 
parts, and Alert NMSB TRENT 1000 72-AJ869 to inspect those post-
rework parts. Consequently, EASA issued AD 2017-0248 to require 
repetitive inspections of the affected IPC Rotor blades and IPC 
shaft Stage 2 dovetail posts and, depending on findings, removal 
from service of the engine for corrective action.
    After that [EASA] AD was issued, prompted by further analysis, 
it was determined that, for certain engines, the front face of IPC 
Rotor 2 Blades and the dovetail posts of the IPC Shaft Stage 2 Rotor 
assembly needed to be inspected earlier. RR issued Alert NMSB TRENT 
1000 72-AK058 to provide instructions for a one-time on-wing 
inspection. Consequently, EASA issued AD 2018-0073, retaining the 
requirements of EASA AD 2017-0248, which was superseded, to require 
an additional borescope inspection of certain engines and, depending 
on findings, removal from service of the engine for corrective 
action.
    Since that [EASA] AD was issued, it was determined that 
repetitive borescope inspections are necessary on all engines to 
ensure fleet-wide continued safe operation. Consequently, RR revised 
Alert NMSB TRENT 1000 72-AJ869, Alert NMSB TRENT 1000 72-AJ814, 
Alert NMSB TRENT 1000 72-AJ819 and NMSB TRENT 1000 72-J871, and 
issued the NMSB to consolidate all inspection instructions.
    For the reason described above, this [EASA] AD retains the 
requirements of EASA AD 2018-0073, which is superseded, and requires 
repetitive on-wing borescope inspections of the affected Rotor 1 and 
Rotor 2 parts and, depending on findings, removal from service of 
the engine for corrective action. This [EASA] AD also introduces 
specific requirements for engines installed on aeroplanes involved 
in ETOPS, and inspection following operation in asymmetric power 
conditions.

    You may obtain further information by examining the MCAI in the AD 
docket on the internet at http://www.regulations.gov by searching for 
and locating Docket No. FAA-2018-0314.

Related Service Information Under 1 CFR Part 51

    We reviewed RR Alert Non-Modification Service Bulletin (NMSB) Trent 
1000 72-AJ819, Revision 2, dated April 12, 2018, and RR Alert NMSB 
Trent 1000 72-AK060, dated April 13, 2018. RR Alert NMSB Trent 1000 72-
AJ819 describes procedures for performing a visual borescope inspection 
of the IPC stage 2 rotor blades and IPC shaft stage 2 dovetail posts. 
RR NMSB Trent 1000 72-AK060 defines the initial inspection threshold 
and repeat inspection intervals for Trent 1000 IPC stage 1 blade, stage 
2 blade and IPC shaft stage 2 dovetail posts. 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.

FAA's Determination

    This product has been approved by EASA and is approved for 
operation in the United States. Pursuant to our bilateral agreement 
with the European Community, EASA has notified us of the unsafe 
condition described in the MCAI and service information referenced 
above. We are issuing this AD because we evaluated all the relevant 
information provided by EASA and determined the unsafe condition 
described previously is likely to exist or develop in other products of 
the same type design.

AD Requirements

    This AD requires initial and repetitive inspections of the IPC 
stage 1 rotor blades, IPC stage 2 rotor blades, and IPC stage 2 shaft 
dovetail posts, and removing any cracked parts from service.

Interim Action

    We consider this AD interim action. RR is developing a modification 
which is expected to be terminating action for the repetitive 
inspections required by this AD.

FAA's Justification and Determination of the Effective Date

    An unsafe condition exists that requires the immediate adoption of 
this AD without providing an opportunity for public comments prior to 
adoption. The FAA has found that the risk to the flying public 
justifies waiving notice and comment prior to adoption of this rule 
because the compliance time for the action is less than the time 
required for public comment. The FAA has reviewed and agrees with 
EASA's determination that certain affected IPC rotor blades and 
dovetail posts must be inspected and, if needed, replaced with a part 
eligible for installation prior to further flight. Failure to inspect 
and replace these parts within the required compliance times could lead 
to failure of the IPC, failure of one or more engines, loss of thrust 
control, and loss of the airplane. Therefore, we find good cause that 
notice and opportunity for prior public comment are impracticable. In 
addition, for the reason stated above, we find that good cause exists 
for making this amendment effective in less than 30 days.

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety and was not preceded by notice and an opportunity for public 
comment. However, we invite you to send any written data, views, or 
arguments about this final rule. Send your comments to an address 
listed under the ADDRESSES section. Include the docket number FAA-2018-
0314 and Product Identifier 2018-NE-11-AD at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this final rule. We will 
consider all comments received by the closing date and may amend this 
final rule because of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this final rule.

Costs of Compliance

    We estimate that this AD affects 28 engines installed on airplanes 
of U.S. registry.
    We estimate the following costs to comply with this AD:

[[Page 17748]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Inspect IPC blade and dovetail post...  6 work-hours x $85 per                $0            $510         $14,280
                                         hour = $510.
----------------------------------------------------------------------------------------------------------------

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.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to engines, propellers, and 
associated appliances to the Manager, Engine and Propeller Standards 
Branch, Policy and Innovation Division.

Regulatory Findings

    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 this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, 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 adding the following new airworthiness 
directive (AD):

2018-08-02 Rolls-Royce plc: Amendment 39-19255; Docket No. FAA-2018-
0314; Product Identifier 2018-NE-11-AD.

(a) Effective Date

    This AD is effective April 24, 2018.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Rolls-Royce plc (RR) Trent 1000-A2, Trent 
1000-AE2, Trent 1000-C2, Trent 1000-CE2, Trent 1000-D2, Trent 1000-
E2, Trent 1000-G2, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and 
Trent 1000-L2 turbofan engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7230, Turbine Engine 
Compressor Section.

(e) Unsafe Condition

    This AD was prompted by reports of intermediate-pressure 
compressor (IPC) rotor blade separations resulting in engine 
failures. We are issuing this AD to prevent failure of the IPC. The 
unsafe condition, if not addressed, could result in failure of one 
or more engines, loss of thrust control, and loss of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) Inspect the IPC stage 1 rotor blades before exceeding the 
applicable initial inspection thresholds specified in Table 1 of RR 
Alert Non-Modification Service Bulletin (NMSB) Trent 1000 72-AK060, 
dated April 13, 2018, or within 80 flight cycles (FCs) after the 
effective date of this AD, whichever occurs later. If Direct 
Accumulation Count cycles, as specified in Table 1 of RR Alert NMSB 
Trent 1000 72-AK060, are not available, then use FCs, regardless of 
Engine Health Monitoring alerts. Thereafter at intervals not to 
exceed 200 FCs, repeat the inspection of the IPC stage 1 rotor 
blades. Use the Accomplishment Instructions, paragraph 3.A., of RR 
Alert NMSB Trent 1000 72-AK060, dated April 13, 2018 to perform the 
inspections.
    (2) Perform an initial inspection of the IPC stage 2 rotor 
blades and IPC shaft stage 2 dovetail posts, using the 
Accomplishment Instructions, paragraph 3.B., of RR Alert NMSB Trent 
1000 72-AK060, dated April 13, 2018. Perform the initial inspection 
based on engine operations as specified in the following paragraphs 
and within the following compliance times:
    (i) For engines with less than 300 FCs since new on the 
effective date of this AD:
    (A) For engines that are not operated on ETOPS (extended 
operations) flights, prior to exceeding 300 FCs or within 50 days 
after the effective date of this AD, whichever occurs later.
    (B) For engines that are operated on ETOPS flights, before 
exceeding 300 FCs or before the next ETOPS flight, whichever occurs 
later.
    (ii) For engines with 300 or more FCs since new on the effective 
date of this AD:
    (A) For engines that are not operated on ETOPS flights, prior to 
exceeding 50 days after the effective date of this AD or within 80 
FCs since the last inspection performed in accordance with RR Alert 
NMSB Trent 1000 72-AJ819, whichever occurs later. This inspection is 
not to exceed 200 FCs since the previous inspection.
    (B) For engines that are operated on ETOPS flights, before the 
next ETOPS flight, or within 80 FCs since the last inspection 
performed in accordance with RR Alert NMSB Trent 1000 72-AJ819, 
whichever occurs later.
    (3) Thereafter, at intervals not to exceed 80 FCs, repeat the 
inspections of the IPC stage 2 rotor blades and IPC shaft stage 2 
dovetail posts required by paragraph (g)(2) of this AD. Use the 
Accomplishment Instructions, paragraph 3.B., of RR Alert Trent 1000 
72-AK060, dated April 13, 2018, to perform these inspections.
    (4) For engines involved in ETOPS operations, inspect the rear 
face of IPC stage 2 rotor blades, part number KH25730, at each 
inspection interval defined in paragraph

[[Page 17749]]

(g)(3) of this AD in accordance with the Accomplishment 
Instructions, paragraph 3.C., of RR Alert Trent 1000 72-AK060, dated 
April 13, 2018.
    (5) As of the effective date of this AD, before the next flight 
after each occurrence where engine operation in asymmetric power 
conditions was sustained for more than 30 minutes at less than 
25,000 feet, either resulting from engine power reduction, or from 
engine in-flight shut-down (IFSD), perform an on-wing borescope 
inspection of the IPC stage 2 rotor blades and IPC shaft stage 2 
dovetail posts on the unaffected engine (no power reduction, no 
IFSD) installed on the airplane. Use the Accomplishment 
Instructions, either paragraph 3.B. for engines not involved in 
ETOPS operations, or paragraphs 3.B. and 3.C. for engines involved 
in ETOPS operations, of RR Alert NMSB Trent 1000 72-AK060, dated 
April 13, 2018, to perform this inspection.
    (6) If any IPC stage 1 rotor blade, IPC stage 2 rotor blade, or 
an IPC shaft stage 2 dovetail post is found cracked during any 
inspection required by this AD, replace the part with a part 
eligible for installation before further flight.

(h) Definitions

    For the purpose of this AD, flight cycles indicated in paragraph 
(g)(1) of this AD are those accumulated by the engine. FCs indicated 
in paragraph (g)(2) of this AD are those accumulated by each 
affected IPC stage 2 rotor blade since first installation on an 
engine. If FCs accumulated by an affected IPC stage 2 rotor blade 
are unknown, then engine FCs since new apply.

(i) Credit for Previous Actions

    (1) If you performed the initial inspections required by 
paragraph (g) of this AD before the effective date of this AD, using 
any of the following you met the initial inspection requirements of 
paragraph (g) of this AD; however, all of the repetitive actions 
still apply:
    (i) RR Alert NMSB Trent 1000 72-AJ814, Initial Issue, dated 
August 17, 2017, or Revision 1, dated September 26, 2017; or
    (ii) RR Alert NMSB Trent 1000 72-AK058, Initial Issue, dated 
March 30, 2018;
    (iii) RR NMSB Trent 1000 72-AJ819, Revision 1, October 9, 2017, 
or Initial Issue, dated August 17, 2017.
    (2) Reserved.

(j) Special Flight Permits

    (1) Special flight permits, as described in Section 21.197 and 
Section 21.199 of the Federal Aviation Regulations (14 CFR 21.197 
and 21.199), are subject to the requirements of paragraph (j)(1)(i) 
of this AD.
    (i) Operators who are prohibited from further flight due to an 
IPC stage 1 rotor blade, IPC stage 2 rotor blade, or an IPC shaft 
stage 2 dovetail post being found cracked, may perform a one-time 
non-revenue ferry flight to a location where the engine can be 
removed from service. This ferry flight must be performed without 
passengers, involve non-ETOPS operation, and consume no more than 
three FCs.
    (ii) Reserved.
    (2) Reserved.

(k) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, ECO Branch, FAA, has the authority to approve 
AMOCs for this AD, if requested using the procedures found in 14 CFR 
39.19. In accordance with 14 CFR 39.19, send your request to your 
principal inspector or local Flight Standards District Office, as 
appropriate. If sending information directly to the manager of the 
certification office, send it to the attention of the person 
identified in paragraph (l)(1) of this AD. You may email your 
request to: [email protected].
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.

(l) Related Information

    (1) For more information about this AD, contact Kevin M. Clark, 
Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: 781-238-7088; fax: 781-238-7199; email: 
[email protected].
    (2) Refer to European Aviation Safety Agency (EASA) AD 2018-
0084, dated April 13, 2018, for more information. You may examine 
the EASA AD in the AD docket on the internet at http://www.regulations.gov by searching for and locating it in Docket No. 
FAA-2018-0314.

(m) 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) Rolls-Royce plc (RR) Alert Non-Modification Service Bulletin 
(NMSB) Trent 1000 72-AJ819, Revision 2, dated April 12, 2018.
    (ii) RR Alert NMSB Trent 1000 72-AK060, Initial Issue, dated 
April 13, 2018.
    (3) For RR service information identified in this AD, contact 
Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, 
England, DE24 8BJ; phone: 011-44-1332-242424; fax: 011-44-1332-
249936; email: royce.com">corporate.care@rolls-royce.com; internet: https://customers.rolls-royce.com/public/rollsroycecare.
    (4) You may view this service information at FAA, Engine & 
Propeller Standards Branch, 1200 District Avenue, Burlington, MA. 
For information on the availability of this material at the FAA, 
call 781-238-7759.
    (5) You may view this service information that is incorporated 
by reference 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 19, 2018.
Karen M. Grant,
Acting Manager, Engine and Propeller Standards Branch, Aircraft 
Certification Service.
[FR Doc. 2018-08602 Filed 4-20-18; 11:15 am]
BILLING CODE 4910-13-P

17746 Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Rules and Regulations model of airplane. It is not a rule of should account for all structural The Director of the Federal Register general applicability. requirements and post-test conditions. approved the incorporation by reference Anthropomorphic test dummies are of certain publications listed in this AD List of Subjects in 14 CFR Part 25 required as part of § 25.562 structural as of April 24, 2018. Aircraft, Aviation safety, Reporting testing. We must receive comments on this and recordkeeping requirements. c. Apply to the seat track the worst- AD by June 8, 2018. The authority citation for these case floor deformation that: ADDRESSES: You may send comments, special conditions is as follows: i. Produces the maximum load into using the procedures found in 14 CFR Authority: 49 U.S.C. 106(g), 40113, 44701, the structural armrest for armrests that 11.43 and 11.45, by any of the following 44702, 44704. are integrally a part of any seat methods: structure. This maximum load includes • Federal eRulemaking Portal: Go to The Special Conditions the load caused by the floor deformation http://www.regulations.gov. Follow the Accordingly, pursuant to the and the load from the aft-facing seat instructions for submitting comments. authority delegated to me by the back. • Fax: 202–493–2251. Administrator, the following special ii. Allows the aft-facing seat back the • Mail: U.S. Department of conditions are issued as part of the type most forward dynamic deformation in Transportation, Docket Operations, certification basis for Textron Model the area of the side-facing seat’s aft M–30, West Building Ground Floor, 700 airplanes with a structural armrest occupant. No contact between the aft- Room W12–140, 1200 New Jersey installed between a side-facing seat, facing seat and the side-facing seat aft Avenue SE, Washington, DC 20590. located forward of aft-facing seats, and occupant is acceptable. • Hand Delivery: U.S. Department of the aft-facing seats. Issued in Renton, Washington, on April 17, Transportation, Docket Operations, 1. The applicant must propose a 2018. M–30, West Building Ground Floor, certification strategy for the structural Paul Siegmund, Room W12–140, 1200 New Jersey armrest. This strategy must address the Acting Manager, Transport Standards Avenue SE, Washington, DC 20590, structural integrity of the structural Branch, Policy and Innovation Division, between 9 a.m. and 5 p.m., Monday armrest and occupant protection after a Aircraft Certification Service. through Friday, except Federal holidays. survivable crash. The strategy must [FR Doc. 2018–08556 Filed 4–23–18; 8:45 am] For service information identified in define how the applicant will ensure BILLING CODE 4910–13–P this final rule, contact Rolls-Royce plc, that the installation, when permanently Corporate Communications, P.O. Box deformed due to the application of 31, Derby, England, DE24 8BJ; phone: static, dynamic, and interaction (with DEPARTMENT OF TRANSPORTATION 011–44–1332–242424; fax: 011–44– aft-facing seat) loads, and while 1332–249936; email: corporate.care@ complying with the applicable §§ 25.561 Federal Aviation Administration rolls-royce.com. Internet: https:// and 25.562 requirements, meets the customers.rolls-royce.com/public/ following conditions: 14 CFR Part 39 rollsroycecare. You may view this a. The proposed structural armrest [Docket No. FAA–2018–0314; Product service information at the FAA, Engine must not contact the occupant in the aft- Identifier 2018–NE–11–AD; Amendment 39– & Propeller Standards Branch, 1200 most seating position of the side-facing 19255; AD 2018–08–02] District Avenue, Burlington, MA 01803. seat, such that the armrest imparts any For information on the availability of RIN 2120–AA64 load, other than incidental and non- this material at the FAA, call 781–238– injurious contact, with the seat Airworthiness Directives; Rolls-Royce 7759. It is also available on the internet occupant. plc Turbofan Engines at http://www.regulations.gov by b. The backrest of the aft-facing seat searching for and locating Docket No. must not touch the occupant in the aft- AGENCY: Federal Aviation FAA–2018–0314. most seating position of the side-facing Administration (FAA), DOT. Examining the AD Docket seat. ACTION: Final rule; request for c. The proposed structural armrest comments. You may examine the AD docket on must not impose loads to the side-facing the internet at http:// seat structure, and; SUMMARY: We are adopting a new www.regulations.gov by searching for d. The seat back of the aft-facing seat airworthiness directive (AD) for all and locating Docket No. FAA–2018– must not, as a result of contact with the Rolls-Royce plc (RR) Trent 1000–A2, 0314; or in person at Docket Operations structural armrest, result in damage or Trent 1000–AE2, Trent 1000–C2, Trent between 9 a.m. and 5 p.m., Monday permanent deformation of the seat back 1000–CE2, Trent 1000–D2, Trent 1000– through Friday, except Federal holidays. that could be injurious to the occupant E2, Trent 1000–G2, Trent 1000–H2, The AD docket contains this final rule, of the aft-facing seat. Trent 1000–J2, Trent 1000–K2, and the mandatory continuing airworthiness 2. In addition, the applicant must: Trent 1000–L2 turbofan engines. This information (MCAI), the regulatory a. Test, to the emergency-landing AD requires initial and repetitive evaluation, any comments received, and conditions listed in § 25.562, the inspections of the intermediate-pressure other information. The street address for structural armrest and the aft-facing seat compressor (IPC) stage 1 rotor blades, Docket Operations (phone: 800–647– together, as a system, with pitch and roll IPC stage 2 rotor blades, and IPC shaft 5527) is listed above. Comments will be of the seat track to ensure that the stage 2 dovetail posts, and removing any available in the AD docket shortly after jstallworth on DSKBBY8HB2PROD with RULES armrest continues to protect the cracked parts from service. This AD was receipt. occupant of the side-facing seat. prompted by IPC blade separations FOR FURTHER INFORMATION CONTACT: b. Conduct 16g forward structural resulting in engine failures. We are Kevin M. Clark, Aerospace Engineer, tests with the combination of the side- issuing this AD to address the unsafe ECO Branch, FAA, 1200 District facing seat, structural armrest, and the condition on these products. Avenue, Burlington, MA 01803; phone: aft-facing seat, accounting for all critical DATES: This AD is effective April 24, 781–238–7088; fax: 781–238–7199; cases. For these tests, the applicant 2018. email: kevin.m.clark@faa.gov. VerDate Sep<11>2014 14:18 Apr 23, 2018 Jkt 244001 PO 00000 Frm 00010 Fmt 4700 Sfmt 4700 E:\FR\FM\24APR1.SGM 24APR1

Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Rules and Regulations 17747 SUPPLEMENTARY INFORMATION: inspection following operation in asymmetric FAA’s Justification and Determination power conditions. of the Effective Date Discussion The European Aviation Safety Agency You may obtain further information An unsafe condition exists that (EASA), which is the Technical Agent by examining the MCAI in the AD requires the immediate adoption of this for the Member States of the European docket on the internet at http:// AD without providing an opportunity Community, has issued EASA AD 2018– www.regulations.gov by searching for for public comments prior to adoption. 0084, dated April 13, 2018 (referred to and locating Docket No. FAA–2018– The FAA has found that the risk to the after this as the MCAI), to address an 0314. flying public justifies waiving notice unsafe condition for the specified and comment prior to adoption of this Related Service Information Under 1 rule because the compliance time for the products. The MCAI states: CFR Part 51 action is less than the time required for Occurrences were reported on RR Trent public comment. The FAA has reviewed 1000 ‘Pack C’ engines, where some IPC Rotor We reviewed RR Alert Non- Modification Service Bulletin (NMSB) and agrees with EASA’s determination 1 and Rotor 2 blades were found cracked. This condition, if not detected and Trent 1000 72–AJ819, Revision 2, dated that certain affected IPC rotor blades corrected, could lead to in-flight blade April 12, 2018, and RR Alert NMSB and dovetail posts must be inspected release, possibly resulting in reduced control Trent 1000 72–AK060, dated April 13, and, if needed, replaced with a part of the aeroplane. 2018. RR Alert NMSB Trent 1000 72– eligible for installation prior to further To address this potential unsafe condition, AJ819 describes procedures for flight. Failure to inspect and replace RR initially issued Alert NMSB TRENT 1000 these parts within the required 72–AJ814 and 72–AJ819 to provide performing a visual borescope inspection of the IPC stage 2 rotor compliance times could lead to failure inspection instructions for IPC Rotor 1 blades and IPC shaft stage 2 dovetail of the IPC, failure of one or more blades, and IPC Rotor 2 blades and IPC shaft Stage 2 dovetail posts, respectively. RR also posts. RR NMSB Trent 1000 72–AK060 engines, loss of thrust control, and loss issued NMSB TRENT 1000 72–J871 to defines the initial inspection threshold of the airplane. Therefore, we find good provide rework instructions for the affected and repeat inspection intervals for Trent cause that notice and opportunity for parts, and Alert NMSB TRENT 1000 72– 1000 IPC stage 1 blade, stage 2 blade prior public comment are impracticable. AJ869 to inspect those post-rework parts. and IPC shaft stage 2 dovetail posts. In addition, for the reason stated above, Consequently, EASA issued AD 2017–0248 we find that good cause exists for This service information is reasonably to require repetitive inspections of the making this amendment effective in less affected IPC Rotor blades and IPC shaft Stage available because the interested parties have access to it through their normal than 30 days. 2 dovetail posts and, depending on findings, removal from service of the engine for course of business or by the means Comments Invited corrective action. identified in the ADDRESSES section. After that [EASA] AD was issued, This AD is a final rule that involves prompted by further analysis, it was FAA’s Determination requirements affecting flight safety and determined that, for certain engines, the front was not preceded by notice and an This product has been approved by opportunity for public comment. face of IPC Rotor 2 Blades and the dovetail posts of the IPC Shaft Stage 2 Rotor assembly EASA and is approved for operation in However, we invite you to send any needed to be inspected earlier. RR issued the United States. Pursuant to our written data, views, or arguments about Alert NMSB TRENT 1000 72–AK058 to bilateral agreement with the European this final rule. Send your comments to provide instructions for a one-time on-wing Community, EASA has notified us of an address listed under the ADDRESSES inspection. Consequently, EASA issued AD the unsafe condition described in the section. Include the docket number 2018–0073, retaining the requirements of MCAI and service information EASA AD 2017–0248, which was FAA–2018–0314 and Product Identifier referenced above. We are issuing this 2018–NE–11–AD at the beginning of superseded, to require an additional AD because we evaluated all the borescope inspection of certain engines and, your comments. We specifically invite relevant information provided by EASA comments on the overall regulatory, depending on findings, removal from service of the engine for corrective action. and determined the unsafe condition economic, environmental, and energy Since that [EASA] AD was issued, it was described previously is likely to exist or aspects of this final rule. We will determined that repetitive borescope develop in other products of the same consider all comments received by the inspections are necessary on all engines to type design. closing date and may amend this final ensure fleet-wide continued safe operation. AD Requirements rule because of those comments. Consequently, RR revised Alert NMSB TRENT 1000 72–AJ869, Alert NMSB TRENT We will post all comments we This AD requires initial and repetitive receive, without change, to http:// 1000 72–AJ814, Alert NMSB TRENT 1000 72–AJ819 and NMSB TRENT 1000 72–J871, inspections of the IPC stage 1 rotor www.regulations.gov, including any and issued the NMSB to consolidate all blades, IPC stage 2 rotor blades, and IPC personal information you provide. We inspection instructions. stage 2 shaft dovetail posts, and will also post a report summarizing each For the reason described above, this removing any cracked parts from substantive verbal contact we receive [EASA] AD retains the requirements of EASA service. about this final rule. AD 2018–0073, which is superseded, and requires repetitive on-wing borescope Interim Action Costs of Compliance inspections of the affected Rotor 1 and Rotor 2 parts and, depending on findings, removal We consider this AD interim action. We estimate that this AD affects 28 from service of the engine for corrective RR is developing a modification which engines installed on airplanes of U.S. action. This [EASA] AD also introduces is expected to be terminating action for registry. jstallworth on DSKBBY8HB2PROD with RULES specific requirements for engines installed on the repetitive inspections required by We estimate the following costs to aeroplanes involved in ETOPS, and this AD. comply with this AD: VerDate Sep<11>2014 14:18 Apr 23, 2018 Jkt 244001 PO 00000 Frm 00011 Fmt 4700 Sfmt 4700 E:\FR\FM\24APR1.SGM 24APR1

17748 Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Rules and Regulations ESTIMATED COSTS Cost per Cost on U.S. Action Labor cost Parts cost product operators Inspect IPC blade and dovetail post ............... 6 work-hours × $85 per hour = $510 ............. $0 $510 $14,280 Authority for This Rulemaking on a substantial number of small entities (g) Required Actions Title 49 of the United States Code under the criteria of the Regulatory (1) Inspect the IPC stage 1 rotor blades specifies the FAA’s authority to issue Flexibility Act. before exceeding the applicable initial inspection thresholds specified in Table 1 of rules on aviation safety. Subtitle I, List of Subjects in 14 CFR Part 39 RR Alert Non-Modification Service Bulletin section 106, describes the authority of (NMSB) Trent 1000 72–AK060, dated April the FAA Administrator. ‘‘Subtitle VII: Air transportation, Aircraft, Aviation 13, 2018, or within 80 flight cycles (FCs) after Aviation Programs,’’ describes in more safety, Incorporation by reference, the effective date of this AD, whichever detail the scope of the Agency’s Safety. occurs later. If Direct Accumulation Count authority. cycles, as specified in Table 1 of RR Alert We are issuing this rulemaking under Adoption of the Amendment NMSB Trent 1000 72–AK060, are not the authority described in Subtitle VII, available, then use FCs, regardless of Engine Accordingly, under the authority Health Monitoring alerts. Thereafter at Part A, Subpart III, Section 44701: delegated to me by the Administrator, ‘‘General requirements.’’ Under that intervals not to exceed 200 FCs, repeat the the FAA amends 14 CFR part 39 as inspection of the IPC stage 1 rotor blades. Use section, Congress charges the FAA with follows: the Accomplishment Instructions, paragraph promoting safe flight of civil aircraft in 3.A., of RR Alert NMSB Trent 1000 72– air commerce by prescribing regulations PART 39—AIRWORTHINESS AK060, dated April 13, 2018 to perform the for practices, methods, and procedures DIRECTIVES inspections. the Administrator finds necessary for (2) Perform an initial inspection of the IPC safety in air commerce. This regulation stage 2 rotor blades and IPC shaft stage 2 ■ 1. The authority citation for part 39 is within the scope of that authority dovetail posts, using the Accomplishment continues to read as follows: Instructions, paragraph 3.B., of RR Alert because it addresses an unsafe condition that is likely to exist or develop on Authority: 49 U.S.C. 106(g), 40113, 44701. NMSB Trent 1000 72–AK060, dated April 13, 2018. Perform the initial inspection based on products identified in this rulemaking § 39.13 [Amended] engine operations as specified in the action. following paragraphs and within the This AD is issued in accordance with ■ 2. The FAA amends § 39.13 by adding following compliance times: authority delegated by the Executive the following new airworthiness (i) For engines with less than 300 FCs since Director, Aircraft Certification Service, directive (AD): new on the effective date of this AD: as authorized by FAA Order 8000.51C. 2018–08–02 Rolls-Royce plc: Amendment (A) For engines that are not operated on In accordance with that order, issuance 39–19255; Docket No. FAA–2018–0314; ETOPS (extended operations) flights, prior to of ADs is normally a function of the Product Identifier 2018–NE–11–AD. exceeding 300 FCs or within 50 days after the Compliance and Airworthiness effective date of this AD, whichever occurs (a) Effective Date later. Division, but during this transition This AD is effective April 24, 2018. (B) For engines that are operated on ETOPS period, the Executive Director has flights, before exceeding 300 FCs or before delegated the authority to issue ADs (b) Affected ADs the next ETOPS flight, whichever occurs applicable to engines, propellers, and None. later. associated appliances to the Manager, (ii) For engines with 300 or more FCs since Engine and Propeller Standards Branch, (c) Applicability new on the effective date of this AD: Policy and Innovation Division. This AD applies to all Rolls-Royce plc (RR) (A) For engines that are not operated on Trent 1000–A2, Trent 1000–AE2, Trent ETOPS flights, prior to exceeding 50 days Regulatory Findings 1000–C2, Trent 1000–CE2, Trent 1000–D2, after the effective date of this AD or within This AD will not have federalism Trent 1000–E2, Trent 1000–G2, Trent 1000– 80 FCs since the last inspection performed in implications under Executive Order H2, Trent 1000–J2, Trent 1000–K2, and Trent accordance with RR Alert NMSB Trent 1000 1000–L2 turbofan engines. 72–AJ819, whichever occurs later. This 13132. This AD will not have a inspection is not to exceed 200 FCs since the substantial direct effect on the States, on (d) Subject previous inspection. the relationship between the national Joint Aircraft System Component (JASC) (B) For engines that are operated on ETOPS government and the States, or on the Code 7230, Turbine Engine Compressor flights, before the next ETOPS flight, or distribution of power and Section. within 80 FCs since the last inspection responsibilities among the various performed in accordance with RR Alert levels of government. (e) Unsafe Condition NMSB Trent 1000 72–AJ819, whichever For the reasons discussed above, I This AD was prompted by reports of occurs later. certify this AD: intermediate-pressure compressor (IPC) rotor (3) Thereafter, at intervals not to exceed 80 (1) Is not a ‘‘significant regulatory blade separations resulting in engine failures. FCs, repeat the inspections of the IPC stage action’’ under Executive Order 12866, We are issuing this AD to prevent failure of 2 rotor blades and IPC shaft stage 2 dovetail (2) Is not a ‘‘significant rule’’ under the IPC. The unsafe condition, if not posts required by paragraph (g)(2) of this AD. jstallworth on DSKBBY8HB2PROD with RULES addressed, could result in failure of one or Use the Accomplishment Instructions, the DOT Regulatory Policies and paragraph 3.B., of RR Alert Trent 1000 72– more engines, loss of thrust control, and loss Procedures (44 FR 11034, February 26, of the airplane. AK060, dated April 13, 2018, to perform 1979), these inspections. (3) Will not affect intrastate aviation (f) Compliance (4) For engines involved in ETOPS in Alaska, and Comply with this AD within the operations, inspect the rear face of IPC stage (4) Will not have a significant compliance times specified, unless already 2 rotor blades, part number KH25730, at each economic impact, positive or negative, done. inspection interval defined in paragraph VerDate Sep<11>2014 14:18 Apr 23, 2018 Jkt 244001 PO 00000 Frm 00012 Fmt 4700 Sfmt 4700 E:\FR\FM\24APR1.SGM 24APR1

Federal Register / Vol. 83, No. 79 / Tuesday, April 24, 2018 / Rules and Regulations 17749 (g)(3) of this AD in accordance with the (k) Alternative Methods of Compliance Issued in Burlington, Massachusetts, on Accomplishment Instructions, paragraph (AMOCs) April 19, 2018. 3.C., of RR Alert Trent 1000 72–AK060, dated (1) The Manager, ECO Branch, FAA, has Karen M. Grant, April 13, 2018. the authority to approve AMOCs for this AD, Acting Manager, Engine and Propeller (5) As of the effective date of this AD, if requested using the procedures found in 14 Standards Branch, Aircraft Certification before the next flight after each occurrence CFR 39.19. In accordance with 14 CFR 39.19, Service. where engine operation in asymmetric power conditions was sustained for more than 30 send your request to your principal inspector [FR Doc. 2018–08602 Filed 4–20–18; 11:15 am] minutes at less than 25,000 feet, either or local Flight Standards District Office, as BILLING CODE 4910–13–P resulting from engine power reduction, or appropriate. If sending information directly from engine in-flight shut-down (IFSD), to the manager of the certification office, perform an on-wing borescope inspection of send it to the attention of the person the IPC stage 2 rotor blades and IPC shaft DEPARTMENT OF COMMERCE identified in paragraph (l)(1) of this AD. You stage 2 dovetail posts on the unaffected may email your request to: ANE-AD-AMOC@ engine (no power reduction, no IFSD) Bureau of the Census faa.gov. installed on the airplane. Use the Accomplishment Instructions, either (2) Before using any approved AMOC, 15 CFR Part 30 paragraph 3.B. for engines not involved in notify your appropriate principal inspector, ETOPS operations, or paragraphs 3.B. and or lacking a principal inspector, the manager [Docket Number: 140905758–8166–02] 3.C. for engines involved in ETOPS of the local flight standards district office/ certificate holding district office. RIN 0607–AA54 operations, of RR Alert NMSB Trent 1000 72– AK060, dated April 13, 2018, to perform this inspection. (l) Related Information Foreign Trade Regulations (FTR): (6) If any IPC stage 1 rotor blade, IPC stage (1) For more information about this AD, Clarification on the Collection and 2 rotor blade, or an IPC shaft stage 2 dovetail contact Kevin M. Clark, Aerospace Engineer, Confidentiality of Kimberley Process post is found cracked during any inspection ECO Branch, FAA, 1200 District Avenue, Certificates required by this AD, replace the part with a Burlington, MA 01803; phone: 781–238– part eligible for installation before further AGENCY: Bureau of the Census, 7088; fax: 781–238–7199; email: flight. Commerce Department. kevin.m.clark@faa.gov. (h) Definitions (2) Refer to European Aviation Safety ACTION: Final rule. For the purpose of this AD, flight cycles Agency (EASA) AD 2018–0084, dated April SUMMARY: The Bureau of the Census indicated in paragraph (g)(1) of this AD are 13, 2018, for more information. You may examine the EASA AD in the AD docket on (Census Bureau) issues this final rule those accumulated by the engine. FCs amending its regulations to clarify that indicated in paragraph (g)(2) of this AD are the internet at http://www.regulations.gov by those accumulated by each affected IPC stage searching for and locating it in Docket No. the data collected from the Kimberley 2 rotor blade since first installation on an FAA–2018–0314. Process Certificates (KPCs) are collected engine. If FCs accumulated by an affected IPC in compliance with the Clean Diamond stage 2 rotor blade are unknown, then engine (m) Material Incorporated by Reference Trade Act. In addition, this rule clarifies FCs since new apply. (1) The Director of the Federal Register the submission requirements and (i) Credit for Previous Actions approved the incorporation by reference permissible uses of the KPCs. (IBR) of the service information listed in this DATES: This final rule is effective July (1) If you performed the initial inspections paragraph under 5 U.S.C. 552(a) and 1 CFR required by paragraph (g) of this AD before 23, 2018. part 51. the effective date of this AD, using any of the FOR FURTHER INFORMATION CONTACT: Dale following you met the initial inspection (2) You must use this service information as applicable to do the actions required by C. Kelly, Chief, International Trade requirements of paragraph (g) of this AD; Management Division, U.S. Census however, all of the repetitive actions still this AD, unless the AD specifies otherwise. (i) Rolls-Royce plc (RR) Alert Non- Bureau, 4600 Silver Hill Road, apply: (i) RR Alert NMSB Trent 1000 72–AJ814, Modification Service Bulletin (NMSB) Trent Washington, DC 20233–6010, by phone Initial Issue, dated August 17, 2017, or 1000 72–AJ819, Revision 2, dated April 12, at 301–763–6937; by fax at 301–763– Revision 1, dated September 26, 2017; or 2018. 8835; or by email at dale.c.kelly@ (ii) RR Alert NMSB Trent 1000 72–AK058, (ii) RR Alert NMSB Trent 1000 72–AK060, census.gov. Initial Issue, dated March 30, 2018; Initial Issue, dated April 13, 2018. SUPPLEMENTARY INFORMATION: (iii) RR NMSB Trent 1000 72–AJ819, (3) For RR service information identified in Revision 1, October 9, 2017, or Initial Issue, this AD, contact Rolls-Royce plc, Corporate Background dated August 17, 2017. Communications, P.O. Box 31, Derby, The Census Bureau is amending the (2) Reserved. England, DE24 8BJ; phone: 011–44–1332– Foreign Trade Regulations (FTR) (15 (j) Special Flight Permits 242424; fax: 011–44–1332–249936; email: CFR part 30) to clarify that the (1) Special flight permits, as described in corporate.care@rolls-royce.com; internet: Kimberley Process Certificates (KPCs) Section 21.197 and Section 21.199 of the https://customers.rolls-royce.com/public/ are not collected under Title 13, United Federal Aviation Regulations (14 CFR 21.197 rollsroycecare. and 21.199), are subject to the requirements (4) You may view this service information States Code (U.S.C.). Instead, the KPCs of paragraph (j)(1)(i) of this AD. at FAA, Engine & Propeller Standards are collected under the Clean Diamond (i) Operators who are prohibited from Branch, 1200 District Avenue, Burlington, Trade Act (CDTA) (Pub. L. 108–19, 19 further flight due to an IPC stage 1 rotor MA. For information on the availability of U.S.C. 3901, et seq.) and Executive blade, IPC stage 2 rotor blade, or an IPC shaft this material at the FAA, call 781–238–7759. Order 13312, entitled ‘‘Implementing stage 2 dovetail post being found cracked, (5) You may view this service information the Clean Diamond Trade Act’’ (68 FR jstallworth on DSKBBY8HB2PROD with RULES may perform a one-time non-revenue ferry 45151, July 29, 2003). The CDTA and that is incorporated by reference at the flight to a location where the engine can be Executive Order 13312 require that the removed from service. This ferry flight must National Archives and Records be performed without passengers, involve Administration (NARA). For information on importation into, and exportation from, non-ETOPS operation, and consume no more the availability of this material at NARA, call the United States of any rough than three FCs. 202–741–6030, or go to: http:// diamonds be controlled through the (ii) Reserved. www.archives.gov/federal-register/cfr/ibr- Kimberley Process Certification Scheme (2) Reserved. locations.html. (KPCS). The KPCS calls on Participants VerDate Sep<11>2014 14:18 Apr 23, 2018 Jkt 244001 PO 00000 Frm 00013 Fmt 4700 Sfmt 4700 E:\FR\FM\24APR1.SGM 24APR1


Document Created: 2018-04-24 00:38:44
Document Modified: 2018-04-24 00:38:44
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; request for comments.
DatesThis AD is effective April 24, 2018.
ContactKevin M. Clark, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7088; fax: 781-238-7199; email: [email protected]
FR Citation83 FR 17746 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety
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