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Federal Register / Vol. 86, No. 228 / Wednesday, December 1, 2021 / Rules and Regulations
could be impaired in case of dispatch with one ADR inoperative MMEL item 341001 during the maximum interval allowed by the current MMEL. The NPRM proposed to require revising the operators existing FAA-approved MEL
for the air data/inertial reference system, as specified in EASA AD 20210103.
The FAA is issuing this AD to address the possibility of in-flight loss of a second ADR combined with erroneous low speed data provided by the remaining functional ADR, which could result in loss of control of the airplane.
See the MCAI for additional background information.

Discussion of Final Airworthiness Directive
to address the unsafe condition on these products.

Comments
Related Service Information Under 1
CFR Part 51

The FAA received a comment from the Air Line Pilots Association, 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

EASA AD 20210103 describes procedures for revising the air data/
inertial reference system for MMEL item 341001. 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 130 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
2 work-hours $85 per hour = $170

$0

$170

$22,100

lotter on DSK11XQN23PROD with RULES1

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 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
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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.
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:

20212225 Airbus SAS: Amendment 39
21798; Docket No. FAA20210568;
Project Identifier MCAI202100446T.
a Effective Date This airworthiness directive AD is effective January 5, 2022.
b Affected ADs None.
c Applicability This AD applies to all Airbus SAS
airplanes specified in paragraphs c1

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through 8 of this AD, certificated in any category.
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 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 34, Navigation.
e Reason This AD was prompted by a report that during the frame of flight test clearance process, a detailed analysis of air data reference ADR failure scenarios led to the identification that compliance requirements for loads and handling qualities throughout the flight envelope could be impaired in case of dispatch with one ADR inoperative master minimum equipment list MMEL
item 341001 during the maximum interval allowed by the current MMEL. The FAA is issuing this AD to address the possibility of in-flight loss of a second ADR combined with erroneous low speed data provided by the remaining functional ADR, which could result in loss of control of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Requirements Except as specified in paragraph h of this AD: Comply with all required actions and compliance times specified in, and in
E:FRFM01DER1.SGM

01DER1