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Rules and Regulations
Federal Register Vol. 86, No. 239
Thursday, December 16, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20211072; Project Identifier MCAI202101248E; Amendment 3921870; AD 20212611
RIN 2120AA64

Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Type Certificate Previously Held by RollsRoyce plc Turbofan Engines Federal Aviation Administration FAA, DOT.
ACTION: Final rule; request for comments.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Rolls-Royce Deutschland Ltd. & Co KG
RRD RB211 Trent 87517, 87717, 88417, 884B17, 89217, 892B17, and 89517 model turbofan engines. This AD was prompted by reports of single engine events caused by water contamination, which led to corrosion on the fuel pump that resulted in loss of engine thrust. This AD requires replacing the fuel pump 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 January 3, 2022.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of January 3, 2022.
The FAA must receive comments on this AD by January 31, 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.

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SUMMARY:

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Fax: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, 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; website:
https www.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 817 222
5110. It is also available in the AD
docket at https www.regulations.gov by searching for and locating Docket No.
FAA20211072. For the material identified in this AD that is not incorporated by reference, contact RollsRoyce plc, Corporate Communications, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; phone: +44 01332 242424;
fax: +44 01332 249936; website:
https www.rolls-royce.com/contactus.aspx.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20211072; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the EASA AD, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Nicholas Paine, Aviation Safety Engineer, ECO Branch, FAA, 1200
District Avenue, Burlington, MA 01803;
phone: 781 2387116; fax: 781 238
7199; email: nicholas.j.paine@faa.gov.
SUPPLEMENTARY INFORMATION:
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210245, dated November 10, 2021 EASA AD

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20210245 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition on RRD RB211 Trent 87517, 87717, 88417, 884B17, 892
17, 892B17, and 89517 model turbofan engines.
This AD was prompted by a report of single engine events that resulted in loss of engine thrust. An investigation by the manufacturer determined that certain engines were exposed to unacceptable levels of water contamination, which caused corrosion on the fuel pump internal components. This corrosion led to debris release and filter blockages in variable stator vane actuator control units, which resulted in the variable stator vane system failing in the closed position. This condition, if not addressed, could result in loss of engine thrust control, in-flight engine shutdown, and reduced control of the airplane. The FAA is issuing this AD to address the unsafe condition on these products.
FAAs Determination This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Community, the FAA has been notified of the unsafe condition described in the MCAI. The FAA is issuing this AD because the agency evaluated all the relevant information provided by EASA and determined the safe 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 2021
0245. EASA AD 20210245 specifies instructions for replacing certain fuel pumps and identifies certain fuel pumps that are not to be installed on an affected engine. 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 Rolls-Royce Alert Non-Modification Service Bulletin NMSB RB.21173AK788, dated November 9, 2021. The NMSB describes procedures for removing and replacing
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