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Federal Register / Vol. 86, No. 139 / Friday, July 23, 2021 / Rules and Regulations
IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.
i European Aviation Safety Agency EASA AD 20160028, dated February 15, 2016.
ii Zodiac Aerospace Service Bulletin SB
0256413, Revision 0, dated November 23, 2015.
iii Zodiac Aerospace Service Bulletin SB
0256413, Revision 1, dated January 19, 2016.
3 For EASA AD 20160028, contact the EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; telephone +49 221 8999
000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this EASA AD on the EASA website at https
ad.easa.europa.eu. For Zodiac Aerospace service information, contact Safran AerosystemsPlaisir, 61 rue Pierre Curie CS20001, 78373 Plaisir Cedex, France;
telephone 33 1 61 34 23 23; fax 33 1 61
34 24 41; or at https www.safranaerosystems.com.
4 You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 8172225110. This material may be found in the AD docket on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210188.
5 You may view this material that is incorporated by reference at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email fedreg.legal@
nara.gov, or go to https www.archives.gov/
federal-register/cfr/ibr-locations.html.
Issued on June 10, 2021.
Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202115480 Filed 72221; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201179; Project Identifier AD202000818E; Amendment 3921638; AD 20211411

khammond on DSKJM1Z7X2PROD with RULES

RIN 2120AA64

Airworthiness Directives; General Electric Company Turbofan Engines Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain
SUMMARY:

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General Electric Company GE CF6
80A and CF680C2 model turbofan engines. This AD was prompted by an inspection by the manufacturer that revealed cracking of the high-pressure turbine HPT rotor stage 1 disk. This AD requires visual inspection and fluorescent penetrant inspection FPI of the HPT thermal shield and, if cracking is detected, removal from service of the HPT thermal shield, HPT rotor stage 1
disk and HPT rotor stage 2 disk. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective August 27, 2021.
ADDRESSES: For service information identified in this final rule, contact General Electric Company, 1 Neumann Way, Cincinnati, OH 45215; phone:
513 5523272; email:
aviation.fleetsupport@ae.ge.com;
website: www.ge.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety 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 at https
www.regulations.gov by searching for and locating Docket No. FAA2020
1179.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20201179; 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, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Kevin M. Clark, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
phone: 781 2387088; fax: 781 238
7199; email: Kevin.M.Clark@faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all General Electric Company GE CF680A, CF680A1, CF680A2, CF680A3, CF680C2A1, CF680C2A2, CF680C2A3, CF680C2A5, CF6
80C2A5F, CF680C2A8, CF680C2B1, CF680C2B1F, CF680C2B1F1, CF6
80C2B1F2, CF680C2B2, CF680C2B2F,
PO 00000

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CF680C2B3F, CF680C2B4, CF6
80C2B4F, CF680C2B5F, CF680C2B6, CF680C2B6F, CF680C2B6FA, CF6
80C2B7F, CF680C2B8F, CF6
80C2D1F, CF680C2K1F, and CF6
80C2L1F model turbofan engines. The NPRM published in the Federal Register on February 22, 2021 86 FR
10496. The NPRM was prompted by an inspection by the manufacturer that revealed cracking of the HPT rotor stage 1 disk caused by increased stress on the HPT rotor stage 1 disk as a result of flange-to-flange cracking on the HPT
thermal shield. In the NPRM, the FAA
proposed to require visual inspection and FPI of the HPT thermal shield and, if cracking is detected, removal from service of the HPT thermal shield, HPT
rotor stage 1 disk and HPT rotor stage 2 disk. The FAA is issuing this AD to address the unsafe condition on these products.
Discussion of Final Airworthiness Directive Comments The FAA received comments from five commenters. The commenters were Atlas Air, Boeing Commercial Airplanes Boeing, Delta Air Lines Delta, United Airlines United and the Air Line Pilots Association, International ALPA. The following presents the comments received on the NPRM and the FAAs response to each comment.
Request To Update Shop Manual Atlas Air requested that the FAA
revise GE CF680C2, ESM 725305, High Pressure Turbine HPT Rotor Thermal ShieldInspection to add the proposed requirement to remove from service the HPT thermal shield, the HPT
rotor stage 1 disk, and the HPT rotor stage 2 disk from service if a crack is found, since the thermal shield can be sent to different vendors outside the engine shop. Delta also suggested that the technical data within the Engine Shop Manual ESM should be updated to ensure inspection requirements are equivalent across all tasks within the ESM.
The FAA disagrees. Requiring updates to the ESM is unnecessary to correct the unsafe condition identified in this AD.
The visual and FPI inspections in the required actions of this AD are the necessary actions to correct the unsafe condition. Operators, at their discretion, may work with the original equipment manufacturer to suggest changes to the ESM to include the inspections required by this AD.

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