AD 2024-08-02

This AD is effective June 6, 2024.

The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of June 6, 2024.

AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2024-0222; 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 W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.

Material Incorporated by Reference:

• For EASA material, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; website easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu.

• You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. It is also available in the AD docket at regulations.gov under Docket No. FAA-2024-0222.

Shahram Daneshmandi, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone: 206-231-3220; email: shahram.daneshmandi@faa.gov.

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to ATR—GIE Avions de Transport Régional Model ATR42-200, -300, -320, and -500; and ATR72-101, -102, -201, -202, -211, -212, and -212A airplanes, except those on which ATR modification (mod) 05948 has been embodied in production. The NPRM published in the Federal Register on February 7, 2024 (89 FR 8361). The NPRM was prompted by AD 2023-0181, dated October 13, 2023 (EASA AD 2023-0181) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union. The MCAI states that one event of electrical failure has been reported on a pre-mod 05948 airplane, possibly caused by a functional item number (FIN) 1PA contactor failing with contacts in the intermediate position.

In the NPRM, the FAA proposed to require repetitive operational tests of the affected part, and, depending on findings, accomplishment of applicable corrective action, as specified in EASA AD 2023-0181. The FAA is issuing this AD to address an electrical failure. This condition, if not addressed, could lead to temporary loss of the direct current emergency electrical network and loss of control of the airplane.

You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA-2024-0222.

The FAA received comments from the Air Line Pilots Association, International, and an anonymous individual, both of whom supported the NPRM without change.

This product has been approved by the aviation authority of another country and is approved for operation in the United States. Pursuant to the FAA's bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI referenced above. The FAA reviewed the relevant data, considered the comments received, and determined that air safety requires adopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on this product. 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.

EASA AD 2023-0181 specifies procedures for repetitive operational tests on the contactor 1PA, and, depending on findings, accomplishment of applicable corrective actions. Corrective actions include replacement of the contactor. 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.

The FAA estimates that this AD affects 49 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

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

Title 49 of the United States Code specifies the FAA's 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 Agency's 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.

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 under the criteria of the Regulatory Flexibility Act.

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

1. The authority citation for part 39 continues to read as follows:

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