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Federal Register / Vol. 86, No. 53 / Monday, March 22, 2021 / Rules and Regulations the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.
For the reasons discussed above, I
certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, 2 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20210510 Airbus Canada Limited Partnership Type Certificate Previously Held by C Series Aircraft Limited Partnership CSALP; Bombardier, Inc.:
Amendment 3921453; Docket No.
FAA20200971; Product Identifier 2020NM083AD.
a Effective Date This airworthiness directive AD is effective April 26, 2021.

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b Affected ADs None.
c Applicability This AD applies to Airbus Canada Limited Partnership type certificate previously held by C Series Aircraft Limited Partnership CSALP; Bombardier, Inc. airplanes, certificated in any category, as identified in paragraphs c1 and 2 of this AD.
1 Model BD5001A10 airplanes, serial numbers 50010 through 50018 inclusive, and 50020 through 50041 inclusive.
2 Model BD5001A11 airplanes, serial numbers 55003 through 55016 inclusive, 55018 through 55054 inclusive, and 55056.
d Subject Air Transport Association ATA of America Code 28, Fuel.

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e Reason This AD was prompted by a report that threaded fuel couplings were incorrectly installed at final assembly and in service.
The FAA is issuing this AD to address loose fuel couplings, which could eventually disconnect and could lead to fuel starvation of the auxiliary power unit APU and pose a risk of fire.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Functional Test of the APU Fuel Feed Line Shroud Within 4,000 flight hours after the effective date of this AD, do an initial functional test of the APU fuel feed line shroud, in accordance with Part A of the Accomplishment Instructions of Airbus Canada Service Bulletin BD500282009, Issue 003, dated August 14, 2020. Thereafter, repeat the functional test at intervals not to exceed 4,000 flight hours. If any functional test reveals a leak, before further flight, do the applicable actions specified in paragraph h of this AD.
h Inspection and Torque of APU Fuel Feed Line Shroud Couplings 1 Except as required by paragraph g of this AD: Within 9,350 flight hours or 56
months, whichever occurs first after the effective date of this AD: Do a general visual inspection of the APU fuel feed line shroud for any loose couplings, and tighten any loose couplings as applicable, in accordance with Part B of the Accomplishment Instructions of Airbus Canada Service Bulletin BD500282009, Issue 003, dated August 14, 2020.
2 For airplanes on which the inspection and tightening of the APU fuel feed line shroud couplings was done before the effective date of this AD, using Part B of the Accomplishment Instructions of Airbus Canada Service Bulletin BD500282009, Issue 001, dated December 13, 2019: Within 9,350 flight hours or 56 months, whichever occurs first after the effective date of this AD, do a general visual inspection of the APU
feed line shroud for any loose couplings between frame FR 63 and FR 80, and tighten any loose couplings as applicable, in accordance with Part C of the Accomplishment Instructions of Airbus Canada Service Bulletin BD500282009, Issue 003, dated August 14, 2020.

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dated December 13, 2019, or Airbus Canada Service Bulletin BD500282009, Issue 002, dated March 18, 2020, provided the functional test is repeated at intervals not to exceed 4,000 flight hours from the completion of those actions specified in paragraph g of this AD.
2 This paragraph provides credit for actions required by paragraph h1 of this AD, if those actions were performed before the effective date of this AD using Airbus Canada Service Bulletin BD500282009, Issue 001, dated December 13, 2019.
k Other FAA AD Provisions The following provisions also apply to this AD:
1 Alternative Methods of Compliance AMOCs: The Manager, New York ACO
Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287300; fax 5167945531. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office.
2 Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation TCCA; or Airbus Canada Limited Partnerships TCCA Design Approval Organization DAO. If approved by the DAO, the approval must include the DAOauthorized signature.

i Terminating Action for the Functional Tests The inspection and tightening of the APU
fuel feed line shroud couplings as specified in paragraph h of this AD terminate the initial and repetitive functional tests of the APU fuel feed line shroud specified in paragraph g of this AD.

l Related Information 1 Refer to Mandatory Continuing Airworthiness Information MCAI TCCA AD
CF202014, dated April 30, 2020, for related information. This MCAI may be found in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA20200971.
2 For more information about this AD, contact Darren Gassetto, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516228
7323; fax 5167945531; email 9-avs-nyacocos@faa.gov.
3 Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs m3 and 4 of this AD.

j Credit for Previous Actions 1 This paragraph provides credit for actions required by paragraph g of this AD, if those actions were performed before the effective date of this AD using Airbus Canada Service Bulletin BD500282009, Issue 001,
m Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.

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