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Federal Register / Vol. 86, No. 234 / Thursday, December 9, 2021 / Rules and Regulations
November 17, 2021. On page 64068, in the first column, in paragraph a, in the second line, January 3, 2022 should have read December 2, 2021. The corrected document is republished in its entirety.

7759. It is also available in the AD
docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210879.

Federal Aviation Administration FAA, DOT.
ACTION: Final rule; request for comments.

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210879; 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 AD, the EASA AD, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Kevin M. Clark, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
phone: 781 2387088; email:
kevin.m.clark@faa.gov.
SUPPLEMENTARY INFORMATION:

AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Rolls-Royce Deutschland Ltd. & Co KG
RRD Trent 1000 model turbofan engines. This AD was prompted by the manufacturer revising the engine Time Limits Manual TLM life limits of certain critical rotating parts and direct accumulation counting data files. This AD requires the operator to revise the airworthiness limitation section ALS
of their existing approved aircraft maintenance program AMP by incorporating the revised tasks of the applicable TLM for each affected model turbofan engine, as specified in a European Union Aviation Safety Agency EASA AD, which is incorporated by reference. The FAA is issuing this AD
to address the unsafe condition on these products.
DATES: This AD is effective December 2, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of December 2, 2021.
The FAA must receive comments on this AD by January 3, 2022.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For material incorporated by reference in this AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000;
email: ADs@easa.europa.eu. You may find this material on the EASA website at https ad.easa.europa.eu. You may view this material 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

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SUMMARY:

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Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20200242, dated November 5, 2020 EASA AD
20200242 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain RRD Trent 1000A, Trent 1000AE, Trent 1000C, Trent 1000CE, Trent 1000D, Trent 1000E, Trent 1000G, and Trent 1000H model turbofan engines.
This AD was prompted by the manufacturer revising the engine TLM
life limits of certain critical rotating parts and updating certain maintenance tasks. The FAA is issuing this AD to address the failure of critical rotating parts.
FAAs Determination These engines have been approved by the aviation authority of another country and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the State of Design Authority, the FAA has been notified about the unsafe condition described in the EASA AD referenced in this proposed AD. The FAA is issuing this AD because the agency evaluated all the relevant information provided by EASA and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design.
Related Service Information Under 1
CFR Part 51
The FAA reviewed EASA AD 2020
0242. EASA AD 20200242 specifies procedures for revising the approved AMP by incorporating the limitations,
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tasks, and associated thresholds and intervals described in the TLM.
This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES.
Other Related Service Information The FAA reviewed Chapter 0510 of Rolls-Royce RR Trent 1000 TLM T
TRENT10RRB, dated August 1, 2020.
RR Trent 1000 TLM TTRENT10RRB, Chapter 0510, identifies the reduced life limits of certain critical rotating parts.
The FAA also reviewed Chapter 05
20 of RR Trent 1000 TLM TTRENT
10RRB, dated August 1, 2020. RR Trent 1000 TLM TTRENT10RRB, Chapter 0520, identifies the critical rotating part inspection thresholds and intervals.
AD Requirements This AD requires accomplishing the actions specified in EASA AD 2020
0242, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this AD and except as discussed under Differences Between this AD and the MCAI.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use some civil aviation authority CAA
ADs as the primary source of information for compliance with requirements for corresponding FAA
ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities CAAs to use this process. As a result, EASA AD 2020
0242 will be incorporated in this final rule. This AD, therefore, requires compliance with EASA AD 20200242
in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this AD. Using common terms that are the same as the heading of a particular section in EASA
AD 20200242 does not mean that operators need comply only with that section. For example, where the AD
requirement refers to all required actions and compliance times, compliance with this AD requirement is not limited to the section titled Required Actions and Compliance Times in EASA AD 20200242.
Service information required by EASA
AD 20200242 for compliance will be available at https www.regulations.gov by searching for and locating Docket No.
FAA20210879.

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