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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Proposed Rules Differences Between the Proposed AD
and the Service Information.
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
0504.
Differences Between This Proposed AD
and the Service Information The effectivity of Boeing Special Attention Service Bulletin 73725

1707, Revision 2, dated July 27, 2020, is limited to Model 737600, 700, 700C, 800, 900, and 900ER series airplanes, having certain line numbers, without a Boeing Sky Interior BSI.
However, the applicability of this proposed AD includes all Boeing Model 737600, 700, 700C, 800, 900, and 900ER series airplanes without a BSI.
Because the affected lanyard assemblies are rotable parts, the FAA has determined that these affected parts
could later be installed on airplanes that were initially delivered with acceptable lanyard assemblies, thereby subjecting those airplanes to the unsafe condition.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 2,045
airplanes of U.S. registry. The FAA
estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS
Action
Parts cost
Cost per product
Cost on U.S.
operators
Up to $13,000

Up to $18,950

Up to $38,752,750.

$0

$85

$173,825.

Labor cost
Measurement and modification reUp to 70 work-hour $85 per hour =
tained actions from AD 20190326.
Up to $5,950.
Inspection of re-identified parts per 1 work-hour $85 per hour = $85
PSU new proposed actions.

The FAA estimates the following costs to do any necessary replacements or re-identifications that would be
required based on the results of the proposed inspection. The FAA has no way of determining the number of
aircraft that might need these replacements or re-identifications:

ON-CONDITION COSTS
Action
Labor cost
Parts cost
Replacement or re-identification per PSU or life vest panel.

Up to 2 work-hour $85 per hour = Up to $170

Up to $196

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

jbell on DSKJLSW7X2PROD with PROPOSALS

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 has 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 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,
PO 00000

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Cost per product Up to $366.

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:
a. Removing Airworthiness Directive AD 20190326, Amendment 39
19578 84 FR 7266, March 4, 2019, and b. Adding the following new AD:

The Boeing Company: Docket No. FAA
20210504; Project Identifier AD2020
01380T.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD action by August 16, 2021.
b Affected ADs This AD replaces AD 20190326, Amendment 3919578 84 FR 7266, March 4, 2019 AD 20190326.
c Applicability This AD applies to The Boeing Company Model 737600, 700, 700C, 800, 900, and 900ER series airplanes, certificated in
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