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Rules and Regulations
Federal Register Vol. 86, No. 176
Wednesday, September 15, 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. FAA20210368; Project Identifier MCAI202100204T; Amendment 3921705; AD 20211804
RIN 2120AA64

Airworthiness Directives; Airbus SAS
Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for all Airbus SAS Model A318, A319, A320, and A321 series airplanes. This AD was prompted by reports of low halon concentration in the forward and aft cargo compartments due to air leakage through cargo door seals, and the certification of improved cargo door seals. This AD requires repetitive cleaning and greasing of affected cargo door seals; replacing the forward, aft, and bulk cargo compartment door seals with new seals; and installing a placard on the forward, aft, and cargo compartment doors; and for certain airplanes, implementing an operational limitation for certain routes, 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 October 20, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of October 20, 2021.
ADDRESSES: For material incorporated by reference IBR in this AD, contact 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
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SUMMARY:

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find this IBR material on the EASA
website at https ad.easa.europa.eu.
You may view this IBR 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 on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0368.
Examining the AD Docket You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0368; 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:
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:
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210049, dated February 18, 2021 EASA AD
20210049 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all Airbus SAS
Model A318111, 112, 121, and 122;
A319111, 112, 113, 114, 115, 131, 132, 133, 151N, 153N, and 171N; A320211, 212, 214, 215, 216, 231, 232, 233, 251N, 252N, 253N, 271N, 272N, and 273N; and A321111, 112, 131, 211, 212, 213, 231, 232, 251N, 252N, 253N, 271N, 272N, 251NX, 252NX, 253NX, 271NX, and 272NX
airplanes. Model A320215 airplanes are not certificated by the FAA and are not included on the U.S. type certificate data sheet; this AD therefore does not
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include those airplanes in the applicability.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all Airbus SAS Model A318, A319, A320, and A321 series airplanes.
The NPRM published in the Federal Register on May 17, 2021 86 FR 26682.
The NPRM was prompted by reports of low halon concentration in the forward and aft cargo compartments due to air leakage through cargo door seals, and the certification of improved cargo door seals. The NPRM proposed to require replacing the forward, aft, and bulk cargo compartment door seals with new seals; and installing a placard on the forward, aft, and cargo compartment doors; and for certain airplanes, implementing an operational limitation for certain routes, as specified in EASA
AD 20210049. The NPRM specified that accomplishing the proposed AD
would terminate all requirements i.e., repetitive cleaning and greasing of affected cargo door seals of AD 2020
1601, Amendment 3921185 85 FR
47013, August 4, 2020 AD 202016
01 for the affected original equipment manufacturer OEM parts only i.e., forward and aft cargo door seals having part number p/n D5237106020000, D5237106020200, D5237106020400, D5237300120000, or D5237300120200;
and bulk cargo door seals having p/n D5237200220000 or D5237200220200.
The FAA is issuing this AD to address low halon concentration, which could affect the fire extinguishing system efficiency in the cargo compartments and possibly result in failure of the system to contain a cargo compartment fire. See the MCAI for additional background information.
Comments The FAA gave the public the opportunity to participate in developing this final rule. The following presents the comments received on the NPRM
and the FAAs response to each comment.
Request To Change NPRM to a Supersedure of AD 20201601
Delta Air Lines Delta requested that the FAA change the NPRM from a new AD to a supersedure of AD 20201601.
Delta stated that a supersedure adds flexibility for operators and makes compliance to the rule simpler and
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