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Federal Register / Vol. 86, No. 195 / Wednesday, October 13, 2021 / Proposed Rules ESTIMATED COSTS
Action
Labor cost
Inspections

13 work-hours $85 per hour = $1,105

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

Cost on U.S.
operators
$1,105

$86,190

of aircraft that might need these oncondition actions.

ON-CONDITION COSTS
Action
Labor cost
Open hole HFEC inspections ..
HFEC and LFEC inspections ..

21 work-hours $85 per hour = $85 per inspection cycle
36 work-hours $85 per hour = $3,060 per inspection cycle
The FAA has included all known costs in its 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.

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.

Authority for This Rulemaking
List of Subjects in 14 CFR Part 39

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,
VerDate Sep<11>2014

16:28 Oct 12, 2021

Jkt 256001

Cost per product
Parts cost $0
0

$1,785 per inspection cycle.
3,060 per inspection cycle.

d Subject Air Transport Association ATA of America Code 53, Fuselage.

The Proposed Amendment
e Unsafe Condition This AD was prompted by reports of incorrectly installed fuselage skin fasteners.
The FAA is issuing this AD to address incorrectly installed fasteners. This condition, if not addressed, could result in incorrectly installed fasteners going undetected. Continuous operation of the airplane with undetected incorrectly installed fasteners may generate fatigue cracking that could adversely affect the structural integrity of the airplane.

Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

f Compliance Comply with this AD within the compliance times specified, unless already done.

PART 39AIRWORTHINESS
DIRECTIVES

g Required Actions Except as specified by paragraph h of this AD: At the applicable times specified in the Compliance paragraph of Boeing Alert Requirements Bulletin 73753A1384 RB, dated September 10, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 73753A1384
RB, dated September 10, 2020.
Note 1 to paragraph g: Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 73753A1384, dated September 10, 2020, which is referred to in Boeing Alert Requirements Bulletin 73753A1384 RB, dated September 10, 2020.

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

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
20210788; Project Identifier AD2021
489T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by November 29, 2021.
b Affected ADs None.
c Applicability This AD applies to The Boeing Company Model 737700, 800, and 900ER series airplanes, certificated in any category, and identified in Boeing Alert Requirements Bulletin 73753A1384 RB, dated September 10, 2020.

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h Exceptions to Service Information Specifications 1 Where the Effectivity paragraph and the Condition and Compliance Time columns of the tables in the Compliance paragraph of Boeing Alert Requirements Bulletin 737
53A1384 RB, dated September 10, 2020, use the phrase the Original Issue date of Requirements Bulletin 73753A1384 RB, this AD requires using the effective date of this AD.
2 Where Boeing Alert Requirements Bulletin 73753A1384 RB, dated September 10, 2020, specifies contacting Boeing for
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