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Federal Register / Vol. 86, No. 210 / Wednesday, November 3, 2021 / Rules and Regulations
current sealant that is identified in Boeing Alert Requirements Bulletin 73757A1350 RB, dated April 23, 2020.
While paragraph i of this AD indicates that AMOC authority may be delegated to the Boeing ODA, the ODA would still need to request that authority from the FAA and should include justification for why the authority should be granted.
The FAA will then make the determination whether the ODA may grant AMOCs for this specific AD.
Conclusion The FAA reviewed the relevant data, considered any comments received, and
determined that air safety requires adopting this AD. Except for minor editorial changes, this AD is adopted as proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin 73757A1350
RB, dated April 23, 2020. The service information specifies procedures for doing a fluid seal contact inspection and a detailed inspection of the left and right wing leading edge outboard blowout door, at the inboard and outboard ends of the hinge, for missing
sealant and applying sealant, if necessary. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES.
Costs of Compliance The FAA estimates that this AD
affects 14 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Inspections

4 work-hours $85 per hour = $340

The FAA estimates the following costs to do any necessary repairs that would be required based on the results
Cost per product
Parts cost
of the inspections. The FAA has no way of determining the number of aircraft
$0

Cost on U.S.
operators
$340

$4,760

that might need these on-condition actions.

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Up to 4 work-hours $85 per hour = Up to $340

Up to $100

The FAA has included all known costs in this cost estimate. According to the manufacturer, however, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators.

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Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII:
Aviation Programs, describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce.
This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

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Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will 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 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.
The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

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Cost per product Up to $440.

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:

20211919 The Boeing Company:
Amendment 3921737; Docket No.
FAA20201166; Project Identifier AD
202000906T.
a Effective Date This airworthiness directive AD is effective December 8, 2021.
b Affected ADs None.
c Applicability This AD applies to The Boeing Company Model 7379 airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 73757A1350 RB, dated April 23, 2020.
d Subject Air Transport Association ATA of America Code 57, Wings.

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