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Federal Register / Vol. 86, No. 172 / Thursday, September 9, 2021 / Proposed Rules
configurations, the compliance times for group 3 and 4 airplanes have been reduced to maintain structural integrity of the airplane.
FAAs Determination The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Boeing Alert Requirements Bulletin 75757A0073
RB, Revision 2, dated March 1, 2021.
This service information specifies procedures for repetitive general visual and detailed inspections for loose fasteners, skin cracking, and shim migration at the upper link drag fittings, and for cracking in the diagonal brace and diagonal brace fittings; repetitive open-hole high frequency eddy current
inspections for cracking of the fastener holes and loose bolt holes; and applicable on-condition actions. Oncondition actions include installing the upper link and upper link pins;
replacing drag fittings; installing bolts, washers, and nuts; performing a torque check of fasteners on the affected shims;
trimming affected shims and applying chemical conversion coating on the shims, fillet seal, and drag fittings; and repairing cracks, migrated shims, mistorqued bolts, and loose fasteners.
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.

20202117. Those requirements are referenced in the service information identified previously, which, in turn, is referenced in paragraph g of this proposed AD. This proposed AD would reduce the compliance times for certain airplanes. This proposed AD would require accomplishing the actions specified in the service information already described, 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. FAA2021
0685.

Proposed AD Requirements in This NPRM

Costs of Compliance
Although this proposed AD does not explicitly restate the requirements of AD
20202117, this proposed AD would retain all of the requirements of AD

The FAA estimates that this AD, if adopted as proposed, would affect 450
airplanes of U.S. registry. The FAA
estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS
Action
Labor cost
Repetitive HFEC inspections
85 work-hours $85 per hour = $7,225 per inspection cycle.

The FAA has received no definitive data on which to base the cost estimates for the on-condition actions specified in this proposed AD.

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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.
Regulatory Findings The FAA has determined that this proposed AD would not have federalism
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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 that the 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
Parts cost
Fmt 4702

Sfmt 4702

$0

$7,225 per inspection cycle.

Cost on U.S.
operators $3,251,250 per inspection cycle.

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:
a. Removing Airworthiness Directive AD 20202117, Amendment 39
21290 85 FR 79418, December 10, 2020, and b. Adding the following new AD:

The Boeing Company: Docket No. FAA
20210685; Project Identifier AD2021
00432T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by October 25, 2021.
b Affected ADs This AD replaces AD 20202117, Amendment 3921290 85 FR 79418, December 10, 2020 AD 20202117.
c Applicability This AD applies to all The Boeing Company Model 757200, 200PF, 200CB, and 300 series airplanes, certificated in any category.

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