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Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations
engine fire control panel with a new or modified panel.
The FAA also reviewed Boeing Requirements Bulletin B78781205
SB26000700 RB, Issue 001, dated February 22, 2019. The service information describes procedures for performing repetitive operational checks of the engine fire handle.
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.

Costs of Compliance The FAA estimates that this AD
affects 122 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
The FAA estimates the total cost per operator for the retained actions from AD 20190203 to be $7,650 90 workhours $85 per work-hour.
The FAA has determined that revising the existing maintenance or inspection program takes an average of 90 workhours per operator, although the agency
recognizes that this number may vary from operator to operator. Since operators incorporate maintenance or inspection program changes for their affected fleets, the FAA has determined that a per-operator estimate is more accurate than a per-airplane estimate.
The FAA estimates the total cost per operator for the new maintenance or inspection program revision to be $7,650 90 work-hours $85 per workhour.

ESTIMATED COSTS FOR REQUIRED REPLACEMENT OR MODIFICATION
Action
Labor cost
Replacement or modification

2 work-hours $85 per hour = $170

According to the manufacturer, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage for affected individuals. As a result, the FAA has included all known costs in our cost estimate.
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 AD
will not have federalism implications under Executive Order 13132. This AD
will 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.

VerDate Sep<11>2014

21:28 Feb 22, 2021

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Parts cost
Cost per product
$5,000

$5,170

Cost on U.S.
operators $630,740

For the reasons discussed above, I
certify that this AD:
1 Is not a significant regulatory action under Executive Order 12866, 2 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

b Affected ADs This AD replaces AD 20190203, Amendment 3919550 84 FR 2437, February 7, 2019 AD 20190203.

List of Subjects in 14 CFR Part 39

e Unsafe Condition This AD was prompted by reports of warpage of internal engine fire handle components that can cause binding and prevent proper operation, and by the development of a new fire handle design that will prevent the unsafe condition. The FAA
is issuing this AD to address a latent failure of the engine fire handle, which could result in the inability to extinguish an engine fire that, if uncontrollable, could lead to wing failure.

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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 20190203, Amendment 39
19550 84 FR 2437, February 7, 2019, and b. Adding the following new AD:

20210206 The Boeing Company:
Amendment 3921389; Docket No.
FAA20200580; Product Identifier 2020NM052AD.
a Effective Date This AD is effective March 30, 2021.

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c Applicability This AD applies to all The Boeing Company Model 7878, 7879, and 78710
airplanes, certificated in any category.
d Subject Air Transport Association ATA of America Code 26, Fire protection.

f Compliance Comply with this AD within the compliance times specified, unless already done.
g Retained Maintenance/Inspection Program Revision, With no Changes This paragraph restates the requirements of paragraph g of AD 20190203, with no changes. Within 14 days after February 22, 2019 the effective date of AD 20190203, revise the existing maintenance or inspection program, as applicable, to add airworthiness limitation 28AWLFIRE, by incorporating the information specified in figure 1 to paragraph g of this AD into the Airworthiness Limitations Section of the Instructions for Continued Airworthiness.
The initial compliance time for accomplishing the actions specified in figure 1 to paragraph g of this AD is within 45
days after February 22, 2019.
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