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Federal Register / Vol. 86, No. 35 / Wednesday, February 24, 2021 / Rules and Regulations 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 responsible Flight Standards Office, as appropriate. If sending information directly to the Large Aircraft Section, International Validation Branch, send it to the attention of the person identified in paragraph k of this AD.
Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office.
2 Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, Large Aircraft Section, International Validation Branch, FAA; or EASA; or Dassault Aviations EASA Design Organization Approval DOA. If approved by the DOA, the approval must include the DOA-authorized signature.

Issued on January 28, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.

k Related Information
SUMMARY:

For more information about this AD, contact Tom Rodriguez, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; phone and fax:
2062313226; email: tom.rodriguez@
faa.gov.

khammond on DSKJM1Z7X2PROD with RULES

l 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. 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.
3 The following service information was approved for IBR on March 31, 2021.
i European Union Aviation Safety Agency EASA AD 20200127, dated June 4, 2020.
ii Reserved 4 For EASA AD 20200127, contact the EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; phone: +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.
5 You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195. This material may be found in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA20200977.
6 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.

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DEPARTMENT OF TRANSPORTATION

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
0371.

Federal Aviation Administration
Examining the AD Docket
FR Doc. 202103601 Filed 22321; 8:45 am BILLING CODE 491013P

14 CFR Part 39
Docket No. FAA20200371; Project Identifier AD201900124E; Amendment 3921405; AD 20210302
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 General Electric Company GE CF6
80C2A1, CF680C2A2, CF680C2A3, CF680C2A5, CF680C2A5F, CF6
80C2A8, CF680C2B1, CF680C2B1F, CF680C2B2, CF680C2B2F, CF6
80C2B4, CF680C2B4F, CF680C2B5F, CF680C2B6, CF680C2B6F, CF6
80C2B6FA, CF680C2B7F, CF6
80C2B8F, and CF680C2D1F model turbofan engines. This AD was prompted by reports of incidents that resulted in a significant fuel loss during flight and an in-flight shutdown IFSD
of the engine. This AD requires initial and repetitive shim checks of the hydromechanical unit/main engine control HMU/MEC idler adapter on the accessory gearbox AGB assembly and, depending on the results of the shim check, possible replacement of the inserts on the HMU/MEC idler adapter.
As a terminating action, this AD
requires a protrusion check and a pullout test, and the replacement of inserts on the HMU/MEC idler adapter that fail either test. The FAA is issuing this AD
to address the unsafe condition on these products.
DATES: This AD is effective March 31, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of March 31, 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@ge.com. You may view this service information at the
PO 00000

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You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20200371; 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, M
30, 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 certain GE CF680C2A1, CF6
80C2A2, CF680C2A3, CF680C2A5, CF680C2A5F, CF680C2A8, CF6
80C2B1, CF680C2B1F, CF680C2B2, CF680C2B2F, CF680C2B4, CF6
80C2B4F, CF680C2B5F, CF680C2B6, CF680C2B6F, CF680C2B6FA, CF6
80C2B7F, CF680C2B8F, and CF6
80C2D1F model turbofan engines. The NPRM published in the Federal Register on April 10, 2020 85 FR
20211. The NPRM was prompted by reports of incidents that resulted in a significant fuel loss during flight and an IFSD of the engine. The incidents resulted from inserts on the HMU/MEC
idler adapter on the AGB assembly pulling out of the housing. An investigation by the manufacturer discovered improperly cut threads on the inserts and erroneous instructions in the maintenance manual, which contributed to poor thread engagement.
In the NPRM, the FAA proposed to require initial and repetitive shim checks of the HMU/MEC idler adapter on the AGB assembly and, depending on the results of the shim check, possible replacement of the inserts on the HMU/MEC idler adapter. As a terminating action to the repetitive shim
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