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Federal Register / Vol. 86, No. 119 / Thursday, June 24, 2021 / Rules and Regulations
33115

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
Replacement retained actions from AD 2016-25-29.
Inspections and replacements new proposed action.

Up to 54 work-hours $85 per hour = Up to $4,590.
Up to 62 work-hour $85 per hour =
Up to $5,270.

Up to $4,590

Up to $1,510,110.

Up to $35,900

Up to $41,170

Up to $13,944,530.

The FAA has received no definitive data that would enable providing parts cost estimates for the retained actions specified in this AD.

The FAA has received no definitive data that would enable us to provide cost estimates for the on-condition actions specified in this AD.
According to the manufacturer, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected operators. The FAA does not control warranty coverage for affected operators. As a result, the FAA has included all available 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.

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Regulatory Findings 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.
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
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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 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
cabin. The FAA is issuing this AD to address a fire in the bilge area of the cargo compartment, which if not contained could lead to a possible smoke and fire event in the passenger compartment.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Except as specified by paragraph h of this AD: At the applicable times specified in paragraph 1.E., Compliance, of Boeing Special Attention Service Bulletin 76725
0550, Revision 1, dated December 4, 2019, do all applicable actions identified as RC
required for compliance in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019.

d Subject Air Transport Association ATA of America Code 25, Equipment/furnishings.

h Exceptions and Clarifications to Service Information Specifications 1 Where Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019, uses the phrase the Revision 1 date of this service bulletin, this AD requires using the effective date of this AD.
2 Where Figure 42A of Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019, identifies item 4 between stations 434
through 456, the correct item between stations 434 through 456 is item 3.
3 Figures 49, 50, and 51 of Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019, are missing the depiction of an insulation blanket, and an installation blanket must be installed between station STA 1395 and 1417.
4 The part numbers for the insulation blankets specified in Boeing Special Attention Service Bulletin 767250550, dated January 15, 2015, and Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019, are acceptable for installation; the new part numbers specified in Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019, require less work to install.

e Unsafe Condition This AD was prompted by a report of a fire in the bilge area of the cargo compartment that burned through the insulation blankets that were intended to prevent smoke from migrating behind the cargo compartment sidewall liners and upward into the main
i Alternative Methods of Compliance AMOCs 1 The Manager, Seattle ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your
2. The FAA amends 39.13 by:
a. Removing Airworthiness Directive AD 20162529, Amendment 39
18755 81 FR 94956, December 27, 2016; and b. Adding the following new AD:

20211211 The Boeing Company:
Amendment 3921598; Docket No.
FAA20200680; Project Identifier 2020NM079AD.
a Effective Date This airworthiness directive AD is effective July 29, 2021.
b Affected ADs This AD replaces AD 20162529, Amendment 3918755 81 FR 94956, December 27, 2016 AD 20162529.
c Applicability This AD applies to The Boeing Company Model 767200, 300, 300F, and 400ER
series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 767250550, Revision 1, dated December 4, 2019.

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