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Federal Register / Vol. 86, No. 165 / Monday, August 30, 2021 / Rules and Regulations airplanes; and Model A321271N, 272N, 271NX, and 272NX airplanes.
This AD was prompted by a report indicating that during inspection of the engines, two original rods installed to maintain an interface plate between the pylon and nacelle were found damaged at both rod-eye ends. This AD requires repetitive inspections of the pylon/
engine interface rods for damage, and applicable corrective actions, and limits the installation of affected parts under certain conditions, 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 becomes effective September 14, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of September 14, 2021.
The FAA must receive comments on this AD by October 14, 2021.
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: 2024932251.
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 IBR in this AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000;
email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this IBR 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, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
It is also available in the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210719.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210719; or in person at Docket Operations between 9 a.m. and 5 p.m.,
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Monday through Friday, except Federal holidays. The AD docket contains this AD, the mandatory continuing airworthiness information MCAI, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Sanjay Ralhan, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
telephone and fax 2062313223; email Sanjay.Ralhan@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under ADDRESSES.
Include Docket No. FAA20210719;
Project Identifier MCAI202100858T
at the beginning of your comments. The most helpful comments reference a specific portion of the final rule, explain the reason for any recommended change, and include supporting data.
The FAA will consider all comments received by the closing date and may amend this final rule because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this final rule.
Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner.
Under the Freedom of Information Act FOIA 5 U.S.C. 552, CBI is exempt from public disclosure. If your comments responsive to this AD contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this AD, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as PROPIN. The FAA
will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this AD. Submissions containing CBI
should be sent to Sanjay Ralhan, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des
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Moines, WA 98198; telephone and fax 2062313223; email Sanjay.Ralhan@
faa.gov. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210177, dated July 23, 2021 EASA AD 2021
0177 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain Airbus SAS Model A319171N; Model A320271N, 272N, and 273N airplanes; and Model A321
271N, 272N, 271NX, and 272NX
airplanes.
This AD was prompted by a report indicating that during inspection of the engines, two original rods installed to maintain an interface plate between the pylon and nacelle were found damaged at both rod-eye ends. Investigation revealed that the rod damage was caused by the high amplitude of vibrations during take-off and climb flight phases, generated by enginedriven pump hydraulic pulsation and potential resonance effects. The FAA is issuing this AD to address damage that could lead to rupture of the rod-eye ends, which could result in fuel and hydraulic pipe chafing, consequent fuel or hydraulic leakage, and possible fire.
See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20210177 specifies procedures for repetitive detailed inspections for damage e.g., hole damage, a crack, or an abnormal deformation of the leftand right-hand pylon/engine interface rod ends of the rod attachment fittings, and the interface plate and upper support brackets, a measurement of the play/gap of the pylon/engine interface upper and lower rod ends, and applicable corrective actions including rod replacement. EASA AD 20210177 also limits the installation of affected parts if/unless inspected within the compliance time specified. 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 the ADDRESSES section.
FAAs Determination These products have been approved by the aviation authority of another country and are approved for operation in the United States. Pursuant to the
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