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Federal Register / Vol. 86, No. 161 / Tuesday, August 24, 2021 / Proposed Rules
Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on 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 this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would 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.
The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

De Havilland Aircraft of Canada Limited Type Certificate Previously Held by Bombardier, Inc.: Docket No. FAA
20210694; Project Identifier MCAI
202100305T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by October 8, 2021.

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b Affected ADs None.
c Applicability This AD applies to De Havilland Aircraft of Canada Limited Model DHC8401 and 402 airplanes, certificated in any category, serial numbers 4001 and 4003 through 4628
inclusive.
d Subject Air Transport Association ATA of America Code 57, Wings.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Within 8,000 flight hours after the effective date of this AD: Do the actions specified in paragraph g1 or 2 of this AD.
1 Replace the 6 outer wing fuel access panel assembly in accordance with Section 3.B., Part A, of the Accomplishment Instructions of De Havilland Aircraft of Canada Limited Service Bulletin 845735, Revision A, dated February 11, 2021.
2 Rework the 6 outer wing fuel access panel assembly, including an eddy current or fluorescent liquid penetrant inspection for crack indications of the rework area, in accordance with Section 3.B., Part B, of the Accomplishment Instructions of De Havilland Aircraft of Canada Limited Service Bulletin 845735, Revision A, dated February 11, 2021. If any crack indication is found, before further flight, repair using a method approved in accordance with the procedures specified in paragraph j2 of this AD.
h Parts Installation Prohibition As of the effective date of this AD, no person may install a 6 outer wing fuel access panel assembly, part numbers P/Ns 85714233003/004 and 85714233005/
006, on any airplane.

PART 39AIRWORTHINESS
DIRECTIVES

39.13

e Unsafe Condition This AD was prompted by reports of a possible hard contact between the 2 top high level sensor HLS terminal screw head and the 6 outer wing fuel access panel stiffener flange. The FAA is issuing this AD
to address the possibility of electrical arcing during a lightning strike, which could be a source of ignition inside the fuel tank.

i Credit for Previous Actions 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 De Havilland Aircraft of Canada Limited Service Bulletin 8457
35, dated October 1, 2020.
j 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 responsible Flight Standards 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 responsible Flight Standards Office.

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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 De Havilland Aircraft of Canada Limiteds TCCA Design Approval Organization DAO. If approved by the DAO, the approval must include the DAOauthorized signature.
k Related Information 1 Refer to Mandatory Continuing Airworthiness Information MCAI TCCA AD
CF202108, dated March 9, 2021, 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. FAA20210694.
2 For more information about this AD, contact Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 5162287347; fax 5167945531;
email 9-avs-nyaco-cos@faa.gov.
3 For service information identified in this AD, contact De Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416
3754000; fax 4163754539; email thd@
dehavilland.com; internet https
dehavilland.com. You may view this service information 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.
Issued on August 18, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202118111 Filed 82321; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210665; Project Identifier AD202100270T
RIN 2120AA64

Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to supersede Airworthiness Directive AD
20172302, which applies to certain The Boeing Company Model 737200, 200C, 300, 400, and 500 series airplanes. AD 20172302 requires
SUMMARY:

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