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Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules which the corrective actions required by this proposed AD have been accomplished. In general, such a prohibition is not necessary since an airplane that is credited for compliance with an AD requirement must be maintained at the AD-compliant configuration. However, the corrective actions required by this AD are accomplished on the TRs and TR

translating sleeves, and those parts can be moved from one airplane to another as part of regular maintenance activities.
To prevent inadvertent maintenance where an AD-compliant airplane is reconfigured to a non-compliant configuration by installing a TR or TR
translating sleeve on which the corrective actions have not been accomplished, this proposed AD would
explicitly specify a parts installation prohibition for those airplanes that have complied with an AD requirement.
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
Serial number inspection
Replacement per
T/R half

6 work-hours $85 per hour = $510
12 work-hours $85 per hour $1,020

The FAA estimates the following costs to do any necessary on-condition repairs, dye-penetrant inspections, TR
sleeve serial number checks, or checks
Cost per product
Parts cost
to determine if certain TR sleeves have been installed on certain TRs, that would be required. The FAA has no way of determining the number of aircraft
$0
0

Cost on U.S.
operators
$510
1,020

Up to $7,140.
Up to $14,280.

that might need these on-condition actions:

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Action
Labor cost
Repair
Dye-penetrant inspection
TR sleeve serial number check
Check to determine if TR translating sleeve has been installed on certain TRs.

Up to 100 work-hours $85 per hour = Up to $8,500
Up to 4 work-hours $85 per hour = Up to $340
1 work-hour $85 per hour = $85
1 work-hour $85 per hour = $85

lotter on DSK11XQN23PROD with PROPOSALS1

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

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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 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.

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Cost per product
Parts cost $0
0 0
0

Up to $8,500.
Up to $340.
$85.
$85.

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:
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
20210571; Project Identifier AD2021
00101T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by September 23, 2021.
b Affected ADs None.

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