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Federal Register / Vol. 86, No. 148 / Thursday, August 5, 2021 / Rules and Regulations
final rule with the changes described previously and 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.
The FAA also determined that these changes will not increase the economic
burden on any operator or increase the scope of this final rule.
Related Service Information Under 1
CFR Part 51
EASA AD 20200273 describes procedures for doing a special detailed inspection flow test of certain solenoid valves by using the flightcrew oxygen masks and replacing any solenoid valve that fails the flow test with a serviceable part. 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:

Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
3 work-hours $85 per hour = $255

$0

$255

$28,560

The FAA estimates the following costs to do any necessary replacement
that would be required based on the results of any actions. The FAA has no
way of determining the number of aircraft that might need replacement:

ESTIMATED COSTS OF ON-CONDITION ACTION
Labor cost
Parts cost
Cost per product
1 work-hour $85 per hour = $85

Up to $5,496

Up to $5,581.

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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.
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 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
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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
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:

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20211511 Airbus SAS: Amendment 39
21658; Docket No. FAA20210131;
Project Identifier MCAI202001628T.
a Effective Date This airworthiness directive AD is effective September 9, 2021.
b Affected ADs None.
c Applicability This AD applies to all Airbus SAS
airplanes, certificated in any category, identified in paragraphs c1 through 8 of this AD.
1 Model A330201, 202, 203, 223, and 243 airplanes.
2 Model A330301, 302, 303, 321, 322, 323, 341, 342, and 343 airplanes.
3 Model A330841 airplanes.
4 Model A330941 airplanes.
5 Model A340211, 212, and 213
airplanes.
6 Model A340311, 312, and 313
airplanes.
7 Model A340541 airplanes.
8 Model A340642 airplanes.
d Subject Air Transport Association ATA of America Code 35, Oxygen.
e Reason This AD was prompted by reports that certain oxygen supply solenoid valves are a potential source of increased flow resistance within the flightcrew oxygen system. The FAA is issuing this AD to address increased flow resistance within the flightcrew oxygen system, which could lead to a reduced flow of oxygen supply to the flightcrew oxygen masks, and in combination with in-flight depressurization, smoke in the flight deck, or a smoke evacuation procedure, could lead to
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