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Federal Register / Vol. 86, No. 12 / Thursday, January 21, 2021 / Proposed Rules
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 the ADDRESSES section.

FAAs Determination The FAA is issuing this NPRM after determining the unsafe condition described previously is likely to exist or develop in other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require accomplishment of the actions identified in Boeing Alert Requirements Bulletin 73757A1350 RB, dated April 23, 2020, described previously, except for any differences identified as
exceptions in the regulatory text of this proposed AD.
For information on the procedures and compliance times, see this service information at https
www.regulations.gov by searching for and locating Docket No. FAA2020
1166.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 14
airplanes of U.S. registry. The FAA
estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
Inspections

4 work-hours $85 per hour = $340

$0

$340

$4,760

The FAA estimates the following costs to do any necessary repairs that would be required based on the results
of the proposed inspections. The FAA
has no way of determining the number
of aircraft that might need these oncondition 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 proposed 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 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:

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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:

The Boeing Company: Docket No. FAA
20201166; Project Identifier AD2020
00906T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by March 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.
e Unsafe Condition This AD was prompted by a report of missing sealant on the left and right wing
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