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Federal Register / Vol. 86, No. 123 / Wednesday, June 30, 2021 / Rules and Regulations airplane. See the MCAI for additional background information.

The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all Airbus SAS Model A330
200, A330200 Freighter, A330300, A340200, and A340300 series airplanes. The NPRM published in the Federal Register on March 22, 2021 86
FR 15151. The NPRM was prompted by a report that the APU aft fuel pump PCB
varnish had deteriorated; the varnish is one of the layers of protection against development of an ignition source. The NPRM proposed to require replacing each affected APU aft fuel pump, as specified in EASA AD 20200265.
The FAA is issuing this AD to address PCB varnish deterioration. This condition, if not addressed, could, in case of a spark or flame in the area of the pump PCB, result in a fire or explosion and consequent loss of the
Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA has considered the comment received. The Air Line Pilots Association, International ALPA
indicated its support for the NPRM.
Conclusion The FAA reviewed the relevant data, considered the comment received, and determined that air safety and the public interest require adopting this final rule as proposed, except for minor editorial changes. The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was already proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
EASA AD 20200265 specifies procedures for replacing each affected APU aft fuel pump. This material 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 112 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
4 work-hours $85 per hour = $340

$7,000

$7,340

$822,080

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 operators. The FAA does not control warranty coverage for affected operators.
As a result, the FAA has included all known costs in the cost estimate
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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.

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 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.
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

Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a
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1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.

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39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20211218 Airbus SAS: Amendment 39
21605; Docket No. FAA20210184;
Project Identifier MCAI202001599T.
a Effective Date This airworthiness directive AD is effective August 4, 2021.
b Affected ADs None.
c Applicability This AD applies to all Airbus SAS
airplanes, certificated in any category, specified in paragraphs c1 through 5 of this AD.
1 Model A330201, 202, 203, 223, and 243 airplanes.
2 Model A330223F and 243F airplanes.
3 Model A330301, 302, 303, 321, 322, 323, 341, 342, and 343 airplanes.
4 Model A340211, 212, and 213
airplanes.
5 Model A340311, 312, and 313
airplanes.
d Subject Air Transport Association ATA of America Code 28, Fuel system.
e Reason This AD was prompted by a report that the auxiliary power unit APU aft fuel pump printed circuit board PCB varnish had deteriorated; the varnish is one of the layers of protection against development of an ignition source. The FAA is issuing this AD
to address PCB varnish deterioration. This
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