82_FR_41677 82 FR 41508 - Airworthiness Directives; General Electric Company Turbofan Engines

82 FR 41508 - Airworthiness Directives; General Electric Company Turbofan Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 82, Issue 169 (September 1, 2017)

Page Range41508-41511
FR Document2017-18570

We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) CF34-8 model turbofan engines. This AD was prompted by analysis that resulted in the reduction of the life of the affected fan blades. This AD requires inspections of the affected fan blades until their removal. We are issuing this AD to address the unsafe condition on these products.

Federal Register, Volume 82 Issue 169 (Friday, September 1, 2017)
[Federal Register Volume 82, Number 169 (Friday, September 1, 2017)]
[Rules and Regulations]
[Pages 41508-41511]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2017-18570]


=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0164; Product Identifier 2017-NE-06-AD; Amendment 
39-19008; AD 2017-17-18]
RIN 2120-AA64


Airworthiness Directives; General Electric Company Turbofan 
Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
General Electric Company (GE) CF34-8 model turbofan engines. This AD 
was prompted by analysis that resulted in the reduction of the life of 
the affected fan blades. This AD requires inspections of the affected 
fan blades until their removal. We are issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective October 6, 2017.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of October 6, 
2017.

ADDRESSES: For service information identified in this final rule, 
contact General Electric Company, GE--Aviation, Room 285, 1 Neumann 
Way, Cincinnati, OH 45215, phone: 513-552-3272; fax: 513-552-3329; 
email: [email protected]. You may view this service information at the 
FAA, Engine and Propeller Standards Branch, Policy and Innovation 
Division, 1200 District Avenue, 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://www.regulations.gov by searching 
for and locating Docket No. FAA-2017-0164.

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-2017-
0164; 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 final rule, 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

[[Page 41509]]

Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 
20590.

FOR FURTHER INFORMATION CONTACT: John Frost, Aerospace Engineer, FAA, 
ECO Branch, Compliance and Airworthiness Division, 1200 District 
Avenue, Burlington, MA 01803; phone: 781-238-7756; fax: 781-238-7199; 
email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 by adding an AD that would apply to certain GE CF34-8 model 
turbofan engines. The NPRM published in the Federal Register on April 
14, 2017 (82 FR 17945). The NPRM was prompted by analysis that showed 
that the stresses in the pinholes, in the affected fan blades, could 
result in crack initiation at pinhole surfaces beyond 19,000, 19,500, 
or 25,000 cycles-since-new (CSN), depending on the engine model on 
which the blade is installed. The NPRM proposed to require initial and 
repetitive eddy current inspections (ECIs) and removal of affected fan 
blades before reaching 41,000 CSN. The NPRM also provided an option to 
repair affected blades, which allows for an additional 28,000 cycles 
before removal. This condition, if not corrected, could result in 
failure of the fan blade, uncontained blade release, damage to the 
engine, and damage to the airplane.

Comments

    We gave the public the opportunity to participate in developing 
this final rule. The following presents the comments received on the 
NPRM and the FAA's response to each comment.
    The Air Line Pilots Association expressed support for the NPRM.

Request To Rescind the AD

    Republic Airlines requested that we rescind the AD action. Republic 
Airlines does not feel that the failure of the blade is an 
airworthiness issue that should be addressed by this AD. Republic 
Airlines feels that in the event of a failed blade, the aircraft could 
continue to a safe flight and landing. The failure would be evident 
operationally and the crews would take the appropriate steps to return 
the aircraft and its occupants safely to the closest airport.
    We disagree. Based on the analysis that resulted in the reduction 
of the life of the affected fan blades, the FAA determined an unsafe 
condition exists based on the extremely high number of forecasted 
events. We did not change this AD.

Request To Change Related Service Information

    J-Air & Horizon Air requested that we mandate the use of specific 
service bulletins in paragraph (g) of this AD. Paragraph (g) of this AD 
does not specify an ECI procedure.
    We partially agree. We disagree with mandating the use of specific 
service bulletins in paragraph (g) of this AD because that would 
preclude the use of other procedures that may be acceptable.
    However, we added a statement to compliance paragraph (g) in this 
AD indicating the GE service documents in which guidance can be found 
for performing the ECI.

Request To Add Repetitive Inspections Intervals

    Horizon Air requested that we provide instructions with regard to 
the repetitive inspection interval requirements for fan blades that 
have accumulated an unknown number of CSN.
    We agree. We added paragraph (g)(4)(iii) of this AD to mandate a 
repetitive inspection.

Request To Add Terminating Action

    Horizon Air requested that we provide a designated paragraph for 
terminating action. Although paragraph (h) of this AD provides fan 
blade, part number (P/N) 4114T31G01, as a repair option, the repair is 
not specifically given as a means to terminate the repetitive 
inspections required for fan blade, P/N 4114T15P02.
    We disagree. This AD requires repetitive inspections only for fan 
blade, P/N 4114T15P02. Therefore, once a fan blade is repaired to P/N 
4114T31G01, a repetitive inspection is not required. We did not change 
this AD.

Request To Update Service Information

    Horizon Air requested that all references to GE Alert Service 
Bulletin (ASB) CF34-8E SB 72-A0115, R03 be revised to R04.
    We agree. We revised this AD to refer to the latest service 
information revision and date.

Conclusion

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

Related Service Information Under 1 CFR Part 51

    We reviewed GE ASB CF34-8C SB 72-A0137, Revision 5 (R05), dated 
June 15, 2016. This ASB identifies an approved inspection method and 
provides the procedures necessary for calculating the adjusted CSN for 
the initial inspection of CF34-8C fan blades.
    We also reviewed CF34-8E ASB 72-A0060, Revision 5 (R05), dated June 
15, 2016. This ASB identifies an approved inspection method and 
provides the procedures necessary for calculating the adjusted CSN for 
the initial inspection of CF34-8E fan blades.
    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.

Other Related Service Information

    We reviewed GE ASBs CF34-8E SB 72-A0115, R04, dated December 9, 
2016; and CF34-8C SB 72-A0225, R03, dated December 9, 2016. These ASBs 
describe procedures for repairing fan blade, part number (P/N) 
4114T15P02 to P/N 4114T31G01, with the installation of a bushing in the 
pinholes.

Costs of Compliance

    We estimate that this AD affects 1,986 engines installed on 
airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

[[Page 41510]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Initial ECI Inspection................  4 work-hours x $85 per                $0            $340        $675,240
                                         hour = $340.
Replacement of fan blade (prorated      0 work-hours x $85 per             5,460           5,460      10,843,560
 annual cost).                           hour = $0.
----------------------------------------------------------------------------------------------------------------

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 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 adding the following new airworthiness 
directive (AD):

2017-17-18 General Electric Company: Amendment 39-19008; Docket No. 
FAA-2017-0164; Product Identifier 2017-NE-06-AD.

(a) Effective Date

    This AD is effective October 6, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to General Electric Company (GE) CF34-8C1, CF34-
8C5, CF34-8C5A1, CF34-8C5B1, CF34-8C5A2, CF34-8C5A3, CF34-8E2, CF34-
8E2A1, CF34-8E5, CF34-8E5A1, CF34-8E5A2, CF34-8E6 and CF34-8E6A1 
engines, including engines marked on the engine data plate as CF34-
8C5B1/B, CF34-8C5/B, CF34-8C5A1/B, CF34-8C5A2/B, CF34-8C5/M, CF34-
8C5A1/M, CF34-C8C5A2/M, CF34-8C5A3/B, or CF34-8C5B1/M, with a fan 
blade, part number (P/N) 4114T15P02 or P/N 4114T31G01, installed.

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by analysis that resulted in the reduction 
of the life of the affected fan blades. We are issuing this AD to 
prevent failure of the fan blade, uncontained blade release, damage 
to the engine, and damage to the airplane.

(f) Compliance

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

(g) Eddy Current Inspections (ECIs)

    (1) For CF34-8C1, CF34-8C5B1, CF34-8C5B1/B and CF34-8E2 engines 
with fan blade, P/N 4114T15P02, installed:
    (i) Perform an initial ECI of the fan blade pinhole prior to the 
fan blade accumulating 25,000 cycles-since-new (CSN); and
    (ii) Repeat this inspection within every 3,000 cycles 
thereafter.
    (2) For CF34-8C5, CF34-8C5/B, CF34-8C5A1, CF34-8C5A1/B, CF34-
8C5A2, CF34-8C5A2/B, CF34-8E2A1, CF34-8E5, CF34-8E5A1, CF34-8E6 and 
CF34-8E6A1 engines with fan blade, P/N 4114T15P02, installed:
    (i) Perform an initial ECI of the fan blade pinhole prior to the 
fan blade accumulating 19,500 CSN; and
    (ii) Repeat this inspection within every 3,000 cycles 
thereafter, until the fan blade has accumulated 25,000 CSN, then 
repeat the inspection every 1,500 cycles thereafter.
    (3) For CF34-8C5/M, CF34-8C5A1/M, CF34-8C5A2/M, CF34-8C5A3, 
CF34-8C5A3/B, CF34-8C5B1/M, and CF34-8E5A2 engines with fan blade, 
P/N 4114T15P02, installed:
    (i) Perform an initial ECI of the fan blade pinhole prior to the 
fan blade accumulating 19,000 CSN; and
    (ii) Repeat this inspection within every 3,000 cycles 
thereafter, until the fan blade has accumulated 25,000 CSN, then 
repeat the inspection every 1,500 cycles thereafter.
    (4) For any affected engine with a fan blade, P/N 4114T15P02, 
installed, where the CSN of the fan blade is unknown on the 
effective date of this AD:
    (i) Assume the blade has accumulated 25,000 CSN on the effective 
date of this AD; and
    (ii) Inspect the blade prior to installation or within 500 
cycles after the effective date of this AD, whichever is earlier.
    (iii) Repeat this inspection based on the intervals of the new 
engine installation, as specified in paragraph (g) of this AD.
    (5) If a fan blade is moved from one affected engine model to 
another affected model after the initial ECI:
    (i) Perform an additional ECI of the blade prior to installation 
in the new model; and
    (ii) Repeat this inspection based on the intervals of the new 
engine installation, as specified in paragraph (g) of this AD.
    (6) If a fan blade, P/N 4114T15P02, has been used on more than 
one engine model prior to the initial ECI, use Appendix A of GE 
Alert Service Bulletin (ASB) CF34-8C SB

[[Page 41511]]

72-A0137, R05, dated June 15, 2016, or Appendix A of GE ASB CF34-8E 
SB 72-A0060, R05, dated June 15, 2016, to calculate the new cycle 
limit for the initial inspection of that fan blade.
    (7) Guidance on performing the ECI can be found in GE Service 
Bulletins GE ASB CF34-8C SB 72-A0137, R05, dated June 15, 2016, or 
GE ASB CF34-8E SB 72-A0060, R05, dated June 15, 2016.

(h) Fan Blade Removal

    (1) For any affected engine with a fan blade, P/N 4114T15P02, 
installed, remove the blade from service or repair to P/N 4114T31G01 
prior to the blade accumulating 41,000 CSN.
    (2) For any affected engine with a fan blade, P/N 4114T31G01, 
installed, remove the blade from service prior to the blade 
accumulating 28,000 cycles since installation of the pinhole 
bushing.

(i) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, FAA, ECO Branch, Compliance and Airworthiness 
Division, 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 ECO Branch, send it to 
the attention of the person identified in paragraph (i)(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.

(j) Related Information

    (1) For more information about this AD, contact John Frost, 
Aerospace Engineer, FAA, ECO Branch, Compliance and Airworthiness 
Division, 1200 District Avenue, Burlington, MA 01803; phone: 781-
238-7756; fax: 781-238-7199; email: [email protected].
    (2) GE ASB CF34-8E SB 72-A0115, R04, dated December 9, 2016, and 
GE ASB CF34-8C SB 72-A0225, R03, dated December 9, 2016, can be 
obtained from GE using the contact information in paragraph (k)(3) 
of this AD.

(k) 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) General Electric Company (GE) Alert Service Bulletin (ASB) 
CF34-8C SB 72-A0137, Revision 5 (R05), dated June 15, 2016.
    (ii) GE ASB CF34-8E SB 72-A0060, Revision 5 (R05), dated June 
15, 2016.
    (3) For General Electric Company service information identified 
in this AD, contact General Electric Company, GE-Aviation, Room 285, 
1 Neumann Way, Cincinnati, OH 45215, phone: 513-552-3272; fax: 513-
552-3329; email: [email protected].
    (4) You may view this service information at FAA, Engine and 
Propeller Standards Branch, Policy and Innovation Division, 1200 
District Avenue, 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 August 29, 2017.
Robert J. Ganley,
Manager, Engine and Propeller Standards Branch, Aircraft Certification 
Service.
[FR Doc. 2017-18570 Filed 8-31-17; 8:45 am]
BILLING CODE 4910-13-P



                                              41508            Federal Register / Vol. 82, No. 169 / Friday, September 1, 2017 / Rules and Regulations

                                              § 1016.21 Accountability for Secret                     § 1016.27 Termination, suspension, or                 DEPARTMENT OF TRANSPORTATION
                                              Restricted Data.                                        revocation of security facility approval.
                                                Each permittee possessing classified                                                                        Federal Aviation Administration
                                                                                                        (a) In accordance with § 1016.12, if
                                              matter (including classified matter in                  the need to use, process, store,
                                              electronic format) containing Secret                                                                          14 CFR Part 39
                                                                                                      reproduce, transmit, or handle classified
                                              Restricted Data shall establish                         matter no longer exists, the security                 [Docket No. FAA–2017–0164; Product
                                              accountability procedures and shall                     facility approval will be terminated. The             Identifier 2017–NE–06–AD; Amendment 39–
                                              maintain logs to document access to and                 permittee may deliver all Restricted                  19008; AD 2017–17–18]
                                              record comprehensive disposition                        Data to the DOE or to a person                        RIN 2120–AA64
                                              information for all such classified
                                                                                                      authorized to receive them; or the
                                              matter that has been in his custody at                                                                        Airworthiness Directives; General
                                                                                                      permittee may destroy all such
                                              any time.                                                                                                     Electric Company Turbofan Engines
                                                                                                      Restricted Data. In either case, the
                                              § 1016.35   [Redesignated as § 1016.22]                 facility must submit a certification of               AGENCY:  Federal Aviation
                                                                                                      non-possession of Restricted Data to the              Administration (FAA), DOT.
                                              ■ 15. Section 1016.35 is redesignated as
                                                                                                      DOE.                                                  ACTION: Final rule.
                                              § 1016.22.
                                                                                                        (b) In any instance where security
                                              § § 1016.36 and 1016.37 [Redesignated as                facility approval has been suspended or               SUMMARY:   We are adopting a new
                                              §§ 1016.23 and 1016.24 and Amended]
                                                                                                      revoked based on a determination of the               airworthiness directive (AD) for certain
                                                                                                                                                            General Electric Company (GE) CF34–8
                                              ■ 16. Sections 1016.36 and 1016.37 are                  DOE that further possession of classified
                                                                                                                                                            model turbofan engines. This AD was
                                              redesignated as §§ 1016.23 and 1016.24                  matter by the permittee would endanger
                                                                                                                                                            prompted by analysis that resulted in
                                              and newly redesignated §§ 1016.23 and                   the common defense and national
                                                                                                                                                            the reduction of the life of the affected
                                              1016.24 are revised to read as follows:                 security, the permittee shall, upon                   fan blades. This AD requires inspections
                                                                                                      notice from the DOE, immediately                      of the affected fan blades until their
                                              § 1016.23   Changes in classification.
                                                                                                      deliver all Restricted Data to the DOE                removal. We are issuing this AD to
                                                Classified matter containing                          along with a certificate of non-                      address the unsafe condition on these
                                              Restricted Data shall not be downgraded                 possession of Restricted Data.                        products.
                                              or declassified except as authorized by
                                              DOE and in accordance with 10 CFR                       § § 1016.40 through 1016.42 [Redesignated             DATES:   This AD is effective October 6,
                                              part 1045.                                              as §§ 1016.28 through 1016.30]                        2017.
                                                                                                                                                               The Director of the Federal Register
                                              § 1016.24 Destruction of classified matter              ■ 20. §§ 1016.40 through 1016.42 are                  approved the incorporation by reference
                                              containing Restricted Data.                             redesignated as §§ 1016.28 through                    of a certain publication listed in this AD
                                                Documents containing Restricted Data                  1016.30.                                              as of October 6, 2017.
                                              may be destroyed by burning, pulping,                                                                         ADDRESSES: For service information
                                                                                                      § 1016.43 [Redesignated as § 1016.31 and
                                              or another method that assures complete                                                                       identified in this final rule, contact
                                                                                                      Amended]
                                              destruction of the information which                                                                          General Electric Company, GE—
                                              they contain. Restricted Data contained                 ■ 21. Section 1016.43 is redesignated as              Aviation, Room 285, 1 Neumann Way,
                                              in classified matter, other than                        § 1016.31 and newly redesignated                      Cincinnati, OH 45215, phone: 513–552–
                                              documents, may be destroyed only by a                   § 1016.31 is revised to read as follows:              3272; fax: 513–552–3329; email:
                                              method that assures complete                                                                                  geae.aoc@ge.com. You may view this
                                              obliteration, removal, or destruction of                § 1016.31    Inspections.                             service information at the FAA, Engine
                                              the Restricted Data.                                                                                          and Propeller Standards Branch, Policy
                                                                                                        The DOE shall make such inspections
                                              ■ 17. Add § 1016.25 to read as follows:                 and surveys of the premises, activities,              and Innovation Division, 1200 District
                                                                                                      records, and procedures of any person                 Avenue, Burlington, MA. For
                                              § 1016.25 Storage, use, processing,                                                                           information on the availability of this
                                              transmission and destruction of classified              subject to the regulations in this part as
                                                                                                      DOE deems necessary to effectuate the                 material at the FAA, call 781–238–7125.
                                              information on computers, computer
                                                                                                                                                            It is also available on the internet at
                                              networks, electronic devices/media and                  purposes of the Act, Executive Order
                                              mobile devices.                                                                                               http://www.regulations.gov by searching
                                                                                                      13526, and DOE orders and procedures.
                                                                                                                                                            for and locating Docket No. FAA–2017–
                                                 Storage, use, processing, and                                                                              0164.
                                                                                                      § 1016.44    [Redesignated as § 1016.32]
                                              transmission of Restricted Data on
                                              computers, computer networks,                           ■ 22. Section 1016.44 is redesignated as              Examining the AD Docket
                                              electronic devices/media and mobile                     § 1016.32.                                              You may examine the AD docket on
                                              devices must be approved by DOE.                                                                              the Internet at http://
                                                                                                      [FR Doc. 2017–18043 Filed 8–31–17; 8:45 am]
                                              DOE-approved methods must be used                                                                             www.regulations.gov by searching for
                                                                                                      BILLING CODE 6450–01–P
                                              when destroying classified information                                                                        and locating Docket No. FAA–2017–
                                              that is in electronic format.                                                                                 0164; or in person at the Docket
                                              § 1016.38   [Redesignated as § 1016.26]
                                                                                                                                                            Management Facility between 9 a.m.
                                                                                                                                                            and 5 p.m., Monday through Friday,
                                              ■ 18. Section 1016.38 is redesignated as                                                                      except Federal holidays. The AD docket
sradovich on DSK3GMQ082PROD with RULES




                                              § 1016.26.                                                                                                    contains this final rule, the regulatory
                                                                                                                                                            evaluation, any comments received, and
                                              § 1016.39 [Redesignated as § 1016.27 and
                                                                                                                                                            other information. The address for the
                                              Amended]
                                                                                                                                                            Docket Office (phone: 800–647–5527) is
                                              ■ 19. Section 1016.39 is redesignated as                                                                      Document Management Facility, U.S.
                                              § 1016.27 and newly redesignated                                                                              Department of Transportation, Docket
                                              § 1016.27 is revised to read as follows:                                                                      Operations, M–30, West Building


                                         VerDate Sep<11>2014   16:20 Aug 31, 2017   Jkt 241001   PO 00000   Frm 00008   Fmt 4700   Sfmt 4700   E:\FR\FM\01SER1.SGM   01SER1


                                                               Federal Register / Vol. 82, No. 169 / Friday, September 1, 2017 / Rules and Regulations                                       41509

                                              Ground Floor, Room W12–140, 1200                        of the affected fan blades, the FAA                   Conclusion
                                              New Jersey Avenue SE., Washington,                      determined an unsafe condition exists
                                              DC 20590.                                               based on the extremely high number of                    We reviewed the relevant data,
                                              FOR FURTHER INFORMATION CONTACT: John                   forecasted events. We did not change                  considered the comments received, and
                                              Frost, Aerospace Engineer, FAA, ECO                     this AD.                                              determined that air safety and the
                                              Branch, Compliance and Airworthiness                                                                          public interest require adopting this
                                                                                                      Request To Change Related Service                     final rule with the changes described
                                              Division, 1200 District Avenue,                         Information
                                              Burlington, MA 01803; phone: 781–                                                                             previously and minor editorial changes.
                                              238–7756; fax: 781–238–7199; email:                       J-Air & Horizon Air requested that we               We have determined that these minor
                                              john.frost@faa.gov.                                     mandate the use of specific service                   changes:
                                              SUPPLEMENTARY INFORMATION:                              bulletins in paragraph (g) of this AD.                   • Are consistent with the intent that
                                                                                                      Paragraph (g) of this AD does not                     was proposed in the NPRM for
                                              Discussion                                              specify an ECI procedure.                             correcting the unsafe condition; and
                                                 We issued a notice of proposed                         We partially agree. We disagree with                   • Do not add any additional burden
                                              rulemaking (NPRM) to amend 14 CFR                       mandating the use of specific service                 upon the public than was already
                                              part 39 by adding an AD that would                      bulletins in paragraph (g) of this AD                 proposed in the NPRM.
                                              apply to certain GE CF34–8 model                        because that would preclude the use of
                                              turbofan engines. The NPRM published                    other procedures that may be                             We also determined that these
                                              in the Federal Register on April 14,                    acceptable.                                           changes will not increase the economic
                                              2017 (82 FR 17945). The NPRM was                                                                              burden on any operator or increase the
                                                                                                        However, we added a statement to
                                              prompted by analysis that showed that                                                                         scope of this final rule.
                                                                                                      compliance paragraph (g) in this AD
                                              the stresses in the pinholes, in the                    indicating the GE service documents in                Related Service Information Under 1
                                              affected fan blades, could result in crack              which guidance can be found for                       CFR Part 51
                                              initiation at pinhole surfaces beyond                   performing the ECI.
                                              19,000, 19,500, or 25,000 cycles-since-                                                                         We reviewed GE ASB CF34–8C SB
                                              new (CSN), depending on the engine                      Request To Add Repetitive Inspections                 72–A0137, Revision 5 (R05), dated June
                                              model on which the blade is installed.                  Intervals                                             15, 2016. This ASB identifies an
                                              The NPRM proposed to require initial                       Horizon Air requested that we                      approved inspection method and
                                              and repetitive eddy current inspections                 provide instructions with regard to the               provides the procedures necessary for
                                              (ECIs) and removal of affected fan                      repetitive inspection interval                        calculating the adjusted CSN for the
                                              blades before reaching 41,000 CSN. The                  requirements for fan blades that have                 initial inspection of CF34–8C fan
                                              NPRM also provided an option to repair                  accumulated an unknown number of                      blades.
                                              affected blades, which allows for an                    CSN.                                                    We also reviewed CF34–8E ASB 72–
                                              additional 28,000 cycles before removal.                   We agree. We added paragraph                       A0060, Revision 5 (R05), dated June 15,
                                              This condition, if not corrected, could                 (g)(4)(iii) of this AD to mandate a                   2016. This ASB identifies an approved
                                              result in failure of the fan blade,                     repetitive inspection.                                inspection method and provides the
                                              uncontained blade release, damage to                                                                          procedures necessary for calculating the
                                              the engine, and damage to the airplane.                 Request To Add Terminating Action
                                                                                                                                                            adjusted CSN for the initial inspection
                                              Comments                                                  Horizon Air requested that we                       of CF34–8E fan blades.
                                                                                                      provide a designated paragraph for                      This service information is reasonably
                                                We gave the public the opportunity to
                                                                                                      terminating action. Although paragraph                available because the interested parties
                                              participate in developing this final rule.
                                                                                                      (h) of this AD provides fan blade, part               have access to it through their normal
                                              The following presents the comments
                                                                                                      number (P/N) 4114T31G01, as a repair                  course of business or by the means
                                              received on the NPRM and the FAA’s
                                                                                                      option, the repair is not specifically                identified in the ADDRESSES section.
                                              response to each comment.
                                                The Air Line Pilots Association                       given as a means to terminate the
                                                                                                      repetitive inspections required for fan               Other Related Service Information
                                              expressed support for the NPRM.
                                                                                                      blade, P/N 4114T15P02.
                                              Request To Rescind the AD                                                                                       We reviewed GE ASBs CF34–8E SB
                                                                                                        We disagree. This AD requires
                                                                                                                                                            72–A0115, R04, dated December 9,
                                                 Republic Airlines requested that we                  repetitive inspections only for fan blade,
                                                                                                                                                            2016; and CF34–8C SB 72–A0225, R03,
                                              rescind the AD action. Republic Airlines                P/N 4114T15P02. Therefore, once a fan
                                                                                                                                                            dated December 9, 2016. These ASBs
                                              does not feel that the failure of the blade             blade is repaired to P/N 4114T31G01, a
                                                                                                                                                            describe procedures for repairing fan
                                              is an airworthiness issue that should be                repetitive inspection is not required. We
                                                                                                                                                            blade, part number (P/N) 4114T15P02 to
                                              addressed by this AD. Republic Airlines                 did not change this AD.
                                                                                                                                                            P/N 4114T31G01, with the installation
                                              feels that in the event of a failed blade,              Request To Update Service Information                 of a bushing in the pinholes.
                                              the aircraft could continue to a safe
                                              flight and landing. The failure would be                  Horizon Air requested that all                      Costs of Compliance
                                              evident operationally and the crews                     references to GE Alert Service Bulletin
                                              would take the appropriate steps to                     (ASB) CF34–8E SB 72–A0115, R03 be                       We estimate that this AD affects 1,986
                                              return the aircraft and its occupants                   revised to R04.                                       engines installed on airplanes of U.S.
                                              safely to the closest airport.                            We agree. We revised this AD to refer               registry.
                                                 We disagree. Based on the analysis                   to the latest service information revision              We estimate the following costs to
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                                              that resulted in the reduction of the life              and date.                                             comply with this AD:




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                                              41510                Federal Register / Vol. 82, No. 169 / Friday, September 1, 2017 / Rules and Regulations

                                                                                                                             ESTIMATED COSTS
                                                                                                                                                                                        Cost per         Cost on U.S.
                                                                        Action                                                    Labor cost                          Parts cost        product           operators

                                              Initial ECI Inspection .......................................   4 work-hours × $85 per hour = $340 .............                   $0            $340          $675,240
                                              Replacement of fan blade (prorated annual                        0 work-hours × $85 per hour = $0 .................              5,460           5,460        10,843,560
                                                 cost).



                                              Authority for This Rulemaking                                       (4) Will not have a significant                     to prevent failure of the fan blade,
                                                                                                                economic impact, positive or negative,                uncontained blade release, damage to the
                                                 Title 49 of the United States Code                                                                                   engine, and damage to the airplane.
                                              specifies the FAA’s authority to issue                            on a substantial number of small entities
                                              rules on aviation safety. Subtitle I,                             under the criteria of the Regulatory                  (f) Compliance
                                              section 106, describes the authority of                           Flexibility Act.                                         Comply with this AD within the
                                              the FAA Administrator. Subtitle VII:                              List of Subjects in 14 CFR Part 39                    compliance times specified, unless already
                                              Aviation Programs, describes in more                                                                                    done.
                                                                                                                  Air transportation, Aircraft, Aviation
                                              detail the scope of the Agency’s                                                                                        (g) Eddy Current Inspections (ECIs)
                                                                                                                safety, Incorporation by reference,
                                              authority.                                                                                                                 (1) For CF34–8C1, CF34–8C5B1, CF34–
                                                 We are issuing this rulemaking under                           Safety.
                                                                                                                                                                      8C5B1/B and CF34–8E2 engines with fan
                                              the authority described in Subtitle VII,                          Adoption of the Amendment                             blade, P/N 4114T15P02, installed:
                                              Part A, Subpart III, Section 44701:                                 Accordingly, under the authority                       (i) Perform an initial ECI of the fan blade
                                              ‘‘General requirements.’’ Under that                              delegated to me by the Administrator,                 pinhole prior to the fan blade accumulating
                                              section, Congress charges the FAA with                                                                                  25,000 cycles-since-new (CSN); and
                                                                                                                the FAA amends 14 CFR part 39 as                         (ii) Repeat this inspection within every
                                              promoting safe flight of civil aircraft in                        follows:
                                              air commerce by prescribing regulations                                                                                 3,000 cycles thereafter.
                                                                                                                                                                         (2) For CF34–8C5, CF34–8C5/B, CF34–
                                              for practices, methods, and procedures                            PART 39—AIRWORTHINESS                                 8C5A1, CF34–8C5A1/B, CF34–8C5A2, CF34–
                                              the Administrator finds necessary for                             DIRECTIVES                                            8C5A2/B, CF34–8E2A1, CF34–8E5, CF34–
                                              safety in air commerce. This regulation                                                                                 8E5A1, CF34–8E6 and CF34–8E6A1 engines
                                              is within the scope of that authority                             ■ 1. The authority citation for part 39               with fan blade, P/N 4114T15P02, installed:
                                              because it addresses an unsafe condition                          continues to read as follows:                            (i) Perform an initial ECI of the fan blade
                                              that is likely to exist or develop on                                 Authority: 49 U.S.C. 106(g), 40113, 44701.        pinhole prior to the fan blade accumulating
                                              products identified in this rulemaking                                                                                  19,500 CSN; and
                                              action.                                                           § 39.13   [Amended]                                      (ii) Repeat this inspection within every
                                                 This AD is issued in accordance with                                                                                 3,000 cycles thereafter, until the fan blade
                                                                                                                ■ 2. The FAA amends § 39.13 by adding                 has accumulated 25,000 CSN, then repeat the
                                              authority delegated by the Executive                              the following new airworthiness                       inspection every 1,500 cycles thereafter.
                                              Director, Aircraft Certification Service,                         directive (AD):                                          (3) For CF34–8C5/M, CF34–8C5A1/M,
                                              as authorized by FAA Order 8000.51C.                                                                                    CF34–8C5A2/M, CF34–8C5A3, CF34–8C5A3/
                                                                                                                2017–17–18 General Electric Company:
                                              In accordance with that order, issuance                               Amendment 39–19008; Docket No.                    B, CF34–8C5B1/M, and CF34–8E5A2 engines
                                              of ADs is normally a function of the                                  FAA–2017–0164; Product Identifier                 with fan blade, P/N 4114T15P02, installed:
                                              Compliance and Airworthiness                                          2017–NE–06–AD.                                       (i) Perform an initial ECI of the fan blade
                                              Division, but during this transition                                                                                    pinhole prior to the fan blade accumulating
                                                                                                                (a) Effective Date                                    19,000 CSN; and
                                              period, the Executive Director has
                                                                                                                  This AD is effective October 6, 2017.                  (ii) Repeat this inspection within every
                                              delegated the authority to issue ADs                                                                                    3,000 cycles thereafter, until the fan blade
                                              applicable to engines, propellers, and                            (b) Affected ADs                                      has accumulated 25,000 CSN, then repeat the
                                              associated appliances to the Manager,                               None.                                               inspection every 1,500 cycles thereafter.
                                              Engine and Propeller Standards Branch,                                                                                     (4) For any affected engine with a fan
                                              Policy and Innovation Division.                                   (c) Applicability                                     blade, P/N 4114T15P02, installed, where the
                                                                                                                   This AD applies to General Electric                CSN of the fan blade is unknown on the
                                              Regulatory Findings                                               Company (GE) CF34–8C1, CF34–8C5, CF34–                effective date of this AD:
                                                This AD will not have federalism                                8C5A1, CF34–8C5B1, CF34–8C5A2, CF34–                     (i) Assume the blade has accumulated
                                              implications under Executive Order                                8C5A3, CF34–8E2, CF34–8E2A1, CF34–8E5,                25,000 CSN on the effective date of this AD;
                                              13132. This AD will not have a                                    CF34–8E5A1, CF34–8E5A2, CF34–8E6 and                  and
                                                                                                                CF34–8E6A1 engines, including engines                    (ii) Inspect the blade prior to installation or
                                              substantial direct effect on the States, on                                                                             within 500 cycles after the effective date of
                                                                                                                marked on the engine data plate as CF34–
                                              the relationship between the national                             8C5B1/B, CF34–8C5/B, CF34–8C5A1/B,                    this AD, whichever is earlier.
                                              government and the States, or on the                              CF34–8C5A2/B, CF34–8C5/M, CF34–8C5A1/                    (iii) Repeat this inspection based on the
                                              distribution of power and                                         M, CF34–C8C5A2/M, CF34–8C5A3/B, or                    intervals of the new engine installation, as
                                              responsibilities among the various                                CF34–8C5B1/M, with a fan blade, part                  specified in paragraph (g) of this AD.
                                              levels of government.                                             number (P/N) 4114T15P02 or P/N                           (5) If a fan blade is moved from one
                                                For the reasons discussed above, I                              4114T31G01, installed.                                affected engine model to another affected
                                              certify that this AD:                                                                                                   model after the initial ECI:
                                                                                                                (d) Subject                                              (i) Perform an additional ECI of the blade
                                                (1) Is not a ‘‘significant regulatory
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                                                                                                                  Joint Aircraft System Component (JASC)              prior to installation in the new model; and
                                              action’’ under Executive Order 12866,
                                                                                                                Code 7230, Turbine Engine Compressor                     (ii) Repeat this inspection based on the
                                                (2) Is not a ‘‘significant rule’’ under                                                                               intervals of the new engine installation, as
                                                                                                                Section.
                                              DOT Regulatory Policies and Procedures                                                                                  specified in paragraph (g) of this AD.
                                              (44 FR 11034, February 26, 1979),                                 (e) Unsafe Condition                                     (6) If a fan blade, P/N 4114T15P02, has
                                                (3) Will not affect intrastate aviation                            This AD was prompted by analysis that              been used on more than one engine model
                                              in Alaska to the extent that it justifies                         resulted in the reduction of the life of the          prior to the initial ECI, use Appendix A of
                                              making a regulatory distinction, and                              affected fan blades. We are issuing this AD           GE Alert Service Bulletin (ASB) CF34–8C SB



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                                                               Federal Register / Vol. 82, No. 169 / Friday, September 1, 2017 / Rules and Regulations                                         41511

                                              72–A0137, R05, dated June 15, 2016, or                     (4) You may view this service information          substantially the same records, or
                                              Appendix A of GE ASB CF34–8E SB 72–                     at FAA, Engine and Propeller Standards                records that have been requested under
                                              A0060, R05, dated June 15, 2016, to calculate           Branch, Policy and Innovation Division, 1200          FOIA three or more times. The Act
                                              the new cycle limit for the initial inspection          District Avenue, Burlington, MA. For
                                                                                                                                                            requires that agencies provide a
                                              of that fan blade.                                      information on the availability of this
                                                (7) Guidance on performing the ECI can be             material at the FAA, call 781–238–7125.               minimum of 90 days for requesters to
                                              found in GE Service Bulletins GE ASB CF34–                 (5) You may view this service information          file an administrative appeal following
                                              8C SB 72–A0137, R05, dated June 15, 2016,               at the National Archives and Records                  an adverse determination, and that
                                              or GE ASB CF34–8E SB 72–A0060, R05,                     Administration (NARA). For information on             agencies provide dispute resolution
                                              dated June 15, 2016.                                    the availability of this material at NARA, call       services at various times throughout the
                                                                                                      202–741–6030, or go to: http://                       FOIA process. The Act codifies the U.S.
                                              (h) Fan Blade Removal
                                                                                                      www.archives.gov/federal-register/cfr/ibr-            Department of Justice’s ‘‘foreseeable
                                                (1) For any affected engine with a fan                locations.html.
                                              blade, P/N 4114T15P02, installed, remove                                                                      harm’’ standard, specifying that an
                                              the blade from service or repair to P/N                   Issued in Burlington, Massachusetts, on             agency shall withhold information only
                                              4114T31G01 prior to the blade accumulating              August 29, 2017.                                      if the agency reasonably foresees that
                                              41,000 CSN.                                             Robert J. Ganley,                                     disclosure would harm an interest
                                                (2) For any affected engine with a fan                Manager, Engine and Propeller Standards               protected by an exemption under 5
                                              blade, P/N 4114T31G01, installed, remove                Branch, Aircraft Certification Service.               U.S.C. 552(b) or if disclosure is
                                              the blade from service prior to the blade               [FR Doc. 2017–18570 Filed 8–31–17; 8:45 am]           prohibited by law. This provision also
                                              accumulating 28,000 cycles since installation                                                                 requires agencies to consider whether
                                              of the pinhole bushing.                                 BILLING CODE 4910–13–P
                                                                                                                                                            partial disclosure is possible if full
                                              (i) Alternative Methods of Compliance                                                                         disclosure is not possible, and to take
                                              (AMOCs)                                                                                                       reasonable steps to segregate and release
                                                                                                      TENNESSEE VALLEY AUTHORITY
                                                 (1) The Manager, FAA, ECO Branch,                                                                          nonexempt information. The Act
                                              Compliance and Airworthiness Division, has              18 CFR Part 1301                                      amends FOIA exemption 5 to specify
                                              the authority to approve AMOCs for this AD,                                                                   that the deliberative process privilege
                                              if requested using the procedures found in 14           Freedom of Information Act                            does not apply to records created 25
                                              CFR 39.19. In accordance with 14 CFR 39.19,             Regulations
                                              send your request to your principal inspector
                                                                                                                                                            years or more before the date of the
                                              or local Flight Standards District Office, as                                                                 request and must be released if
                                                                                                      AGENCY:  Tennessee Valley Authority
                                              appropriate. If sending information directly                                                                  requested.
                                                                                                      (TVA).                                                   The Tennessee Valley Authority
                                              to the manager of the ECO Branch, send it to
                                              the attention of the person identified in               ACTION: Final rule.                                   issues a final rule amending its Freedom
                                              paragraph (i)(1) of this AD. You may email                                                                    of Information Act (FOIA) regulations to
                                              your request to: ANE-AD-AMOC@faa.gov.                   SUMMARY:   The Tennessee Valley
                                                                                                                                                            incorporate the statutory changes made
                                                 (2) Before using any approved AMOC,                  Authority issues this final rule
                                                                                                                                                            to the FOIA by the Act. TVA exercises
                                              notify your appropriate principal inspector,            amending its Freedom of Information
                                                                                                                                                            no discretion in implementing these
                                              or lacking a principal inspector, the manager           Act (FOIA) regulations to incorporate
                                              of the local flight standards district office/
                                                                                                                                                            statutory changes, therefore, public
                                                                                                      the statutory changes made to the FOIA
                                              certificate holding district office.                                                                          notice and comment is not required
                                                                                                      by the FOIA Improvement Act of 2016
                                                                                                                                                            pursuant to 5 U.S.C. 553(b)(B). For these
                                              (j) Related Information                                 (Act). The TVA’s FOIA regulations
                                                                                                                                                            same reasons, the 30-day delay in
                                                 (1) For more information about this AD,              provide the procedures by which the
                                                                                                                                                            effective date provided for in 5 U.S.C.
                                              contact John Frost, Aerospace Engineer, FAA,            public may request records from TVA,
                                                                                                                                                            553(d) is waived.
                                              ECO Branch, Compliance and Airworthiness                and the policies and procedures by
                                              Division, 1200 District Avenue, Burlington,             which TVA provides such records to the                List of Subjects in 18 CFR Part 1301
                                              MA 01803; phone: 781–238–7756; fax: 781–                public upon written request. TVA is                     Freedom of Information, Privacy,
                                              238–7199; email: john.frost@faa.gov.                    updating its regulations to incorporate
                                                 (2) GE ASB CF34–8E SB 72–A0115, R04,                                                                       Government in the Sunshine.
                                                                                                      the procedural requirements of the Act.                 For the reasons stated in the
                                              dated December 9, 2016, and GE ASB CF34–
                                              8C SB 72–A0225, R03, dated December 9,                  DATES: This rule is effective September               preamble, TVA amends 18 CFR part
                                              2016, can be obtained from GE using the                 1, 2017.                                              1301 as follows:
                                              contact information in paragraph (k)(3) of              ADDRESSES: Tennessee Valley Authority,
                                              this AD.                                                Freedom of Information Act Office, 400                PART 1301—PROCEDURES
                                              (k) Material Incorporated by Reference                  W. Summit Hill Drive (WT 7D),
                                                                                                      Knoxville, TN 37902–1401.                             ■ 1. The authority citation for part 1301
                                                 (1) The Director of the Federal Register                                                                   Subpart A continues to read as follows:
                                              approved the incorporation by reference                 FOR FURTHER INFORMATION CONTACT: Ms.
                                              (IBR) of the service information listed in this         Denise Smith, FOIA Officer, Tennessee                   Authority: 16 U.S.C. 831–831dd, 5 U.S.C.
                                              paragraph under 5 U.S.C. 552(a) and 1 CFR                                                                     552.
                                                                                                      Valley Authority, 400 W. Summit Hill
                                              part 51.                                                Drive (WT 7D), Knoxville, TN 37902–                   ■ 2. Subpart A of part 1301 is revised as
                                                 (2) You must use this service information
                                                                                                      1401. Telephone: (865) 632–6945.                      follows:
                                              as applicable to do the actions required by
                                              this AD, unless the AD specifies otherwise.             Email: dsmith@tva.gov.                                Subpart A—Freedom of Information Act
                                                 (i) General Electric Company (GE) Alert              SUPPLEMENTARY INFORMATION: The FOIA                   Sec.
                                              Service Bulletin (ASB) CF34–8C SB 72–                   Improvement Act of 2016 requires that                 1301.1 General provisions.
                                              A0137, Revision 5 (R05), dated June 15, 2016.           Federal agencies review and update                    1301.2 Proactive disclosures.
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                                                 (ii) GE ASB CF34–8E SB 72–A0060,                     their FOIA regulations in accordance                  1301.3 Requirements for making requests.
                                              Revision 5 (R05), dated June 15, 2016.                                                                        1301.4 Responsibility for responding to
                                                                                                      with its provisions. The provisions
                                                 (3) For General Electric Company service                                                                        requests.
                                              information identified in this AD, contact
                                                                                                      include a requirement that agencies                   1301.5 Timing of responses to requests.
                                              General Electric Company, GE-Aviation,                  make available for public inspection, in              1301.6 Responses to requests.
                                              Room 285, 1 Neumann Way, Cincinnati, OH                 an electronic format records, that have               1301.7 Exempt records.
                                              45215, phone: 513–552–3272; fax: 513–552–               become or are likely to become the                    1301.8 Confidential commercial
                                              3329; email: geae.aoc@ge.com.                           subject of subsequent requests for                         information.



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Document Created: 2017-09-01 01:50:43
Document Modified: 2017-09-01 01:50:43
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 October 6, 2017.
ContactJohn Frost, Aerospace Engineer, FAA, ECO Branch, Compliance and Airworthiness Division, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7756; fax: 781-238-7199; email: [email protected]
FR Citation82 FR 41508 
RIN Number2120-AA64
CFR AssociatedAir Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

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