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Federal Register / Vol. 86, No. 195 / Wednesday, October 13, 2021 / Rules and Regulations NPRM published in the Federal Register on July 14, 2021 86 FR 37087.
The NPRM was prompted by a report that during flight tests, the opening of the ram air outlet flaps was found to cause a disturbance of the air flow around the RAT when the L/G is extended. The NPRM proposed to require revising the existing AFM and applicable corresponding operational procedures to provide procedures for all engines failure and L/G gravity extension related to certain software, and installing ATQC V3 for the FWS
SW STD 6/2.0, as specified in EASA AD
20210061.
The FAA is issuing this AD to address a non-negligible effect on the overall performance of the RAT in case of total engine flame out TEFO or electrical emergency configuration combined with the auxiliary power unit APU running, which could lead to partial or total loss of RAT electrical power generation when the RAT is deployed in an emergency condition with the landing gear extended, and possibly result in reduced control of the airplane. See the MCAI for additional background information.

searching for and locating Docket No.
FAA20210563; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information MCAI, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
telephone and fax 2062313225; email Dan.Rodina@faa.gov.
SUPPLEMENTARY INFORMATION:
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210061, dated March 5, 2021 EASA AD 2021
0061 also referred to as the MCAI, to correct an unsafe condition for certain Airbus SAS Model A350941 and 1041
airplanes.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to certain Airbus SAS Model A350941 and 1041 airplanes. The
International ALPA, who supported the NPRM without change.
Conclusion The FAA reviewed the relevant data, considered the comment received, and determined that air safety requires adopting this AD as proposed. Except for minor editorial changes, this AD is adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
Accordingly, the FAA is issuing this AD
to address the unsafe condition on these products.
Related Service Information Under 1
CFR Part 51
EASA AD 20210061 describes procedures for revising the existing AFM to provide procedures for all engines failure and L/G gravity extension related to certain software, and installing ATQC V3 for the FWS
SW STD 6/2.0. 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.

Discussion of Final Airworthiness Directive
Costs of Compliance
Comments
The FAA estimates that this AD
affects 17 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

The FAA received comments from The Air Line Pilots Association,
ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
3 work-hours $85 per hour = $255

$0

$255

$4,335

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

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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.

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.

Regulatory Findings
List of Subjects in 14 CFR Part 39

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:

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

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The Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

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