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Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Rules and Regulations to address the unsafe condition on these products.
DATES: This AD becomes effective August 30, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of August 30, 2021.
The FAA must receive comments on this AD by September 27, 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, 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 IBR in this AD, contact TCCA, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada;
telephone 8886633639; email ADCN@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 at https www.regulations.gov by searching for and locating Docket No.
FAA20210669.

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Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210669; 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, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Jiwan Karunatilake, Aerospace Engineer, Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516
2287300; fax 5167945531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:

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Background TCCA, which is the aviation authority for Canada, has issued TCCA AD CF
202109, dated March 11, 2021 TCCA
AD CF202109 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 AD was prompted by the determination that a new configuration of the pylon-to-wing area MF flexible fuel line assembly was introduced without revision or modification to the installation procedure, potentially resulting in a twisted MF flexible fuel line in the shroud. This can restrict the flow of fuel of the MF, which can cause fuel imbalance and possible damage including abrasion to the shroud assembly. The FAA is issuing this AD
to address this condition, which could result in the consequent abrasion of the fuel line and a possible fuel leak; as a result, the electrical harness connectors in the wing area could be a potential ignition source and pose a risk of fire.
See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
TCCA AD CF202109 describes procedures for a general visual inspection for damage including permanent deformities of the left and right MF fuel line assemblies including the flexible-hose assembly and shroud assembly, and replacement of affected MF fuel line assemblies including cleaning of the ends of the flexible-hose assembly, injecting grease at both ends of the flexible-hose assembly, and torqueing the aft end of the flexible-hose assembly. 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 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 issuing this AD
because the FAA evaluated all pertinent information and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design.

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Requirements of This AD
This AD requires accomplishing the actions specified in TCCA AD CF2021
09 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 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 been coordinating this process with manufacturers and CAAs. As a result, TCCA AD CF2021
09 is incorporated by reference in this AD. This AD requires compliance with TCCA AD CF202109 in its entirety through that incorporation, except for any differences identified as exceptions in the regulatory text of this AD. Service information required by TCCA AD CF
202109 for compliance will be available at https www.regulations.gov by searching for and locating Docket No.
FAA20210669 after this AD is published.
FAAs Justification and Determination of the Effective Date An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption.
The FAA has found that the risk to the flying public justifies waiving notice and comment prior to adoption of this rule because a twisted MF flexible fuel line in the shroud can restrict the flow of fuel of the MF and cause fuel imbalance and possible damage including abrasion to the shroud assembly and fuel line, resulting in a fuel leak; as a result, the electrical harness connectors in the wing area are a potential ignition source and pose a risk of fire. In addition, the compliance time for the required action is shorter than the time necessary for the public to comment and for publication of the final rule. Therefore, the FAA finds good cause that notice and opportunity for prior public comment are impracticable.
In addition, for the reasons stated above, the FAA finds that good cause exists for making this amendment effective in less than 30 days.
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this AD. Send your comments to an address listed under ADDRESSES. Include Docket No. FAA

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