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Federal Register / Vol. 86, No. 162 / Wednesday, August 25, 2021 / Proposed Rules National Aircraft Certification, 159
Cleopatra Drive, Nepean, Ontario K1A
0N5, Canada; telephone 8886633639;
email AD-CN@tc.gc.ca; internet https
tc.canada.ca/en/aviation. 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
0696.
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
0696; 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:

Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287362; fax 5167945531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:

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Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210696; Project Identifier MCAI202100032T at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, 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 the proposal 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 proposed AD.

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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 NPRM
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 NPRM, 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 NPRM. Submissions containing CBI
should be sent to Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516
2287362; fax 5167945531; email 9avs-nyaco-cos@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 TCCA, which is the aviation authority for Canada, has issued TCCA AD CF
202101, dated January 8, 2021 TCCA
AD CF202101 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain Airbus Canada Limited Partnership Model BD
5001A10 and BD5001A11 airplanes.
This proposed AD was prompted by reports of loose powerplant FIREX
interconnection hoses, and in one instance a hose was found disconnected. An investigation by the manufacturer determined that if the instructions for connecting the FIREX
hose are not followed properly, hoses can become loose or disconnected. The FAA is proposing this AD to address the possibility that fire extinguishing agent may not be effectively applied should a fire occur within a powerplant assembly that has a partially or completely disconnected FIREX hose, which could result in the inability to put out a fire in the engine. See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
TCCA AD CF202101 describes procedures for replacing certain existing FIREX hose assemblies on each
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powerplant with a newly designed FIREX hose assembly with provisions for the installation of safety cables at each end, in order to prevent the hose from becoming loose or disconnected.
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 and Requirements of This Proposed AD
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 State of Design Authority, the FAA has been notified of the unsafe condition described in the MCAI referenced above. The FAA is proposing this AD
because the FAA evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design.
Proposed AD Requirements This proposed AD would require accomplishing the actions specified in TCCA AD CF202101 described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this AD.
Explanation of Required Compliance Information In the FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA initially worked with Airbus and the European Union Aviation Safety Agency EASA to develop a process to use certain EASA
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, TCCA AD CF
202101 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with TCCA AD CF202101
in its entirety, through that incorporation, except for any differences identified as exceptions in the regulatory text of this proposed AD.
Service information specified in TCCA
AD CF202101 that is required for compliance with TCCA AD CF202101
will be available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210696 after the FAA final rule is published.

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