Airworthiness Directives; Safran Helicopter Engines

Federal Aviation Administration (FAA), DOT.

Notice of proposed rulemaking (NPRM); withdrawal.

The FAA is withdrawing an NPRM that proposed to adopt a new airworthiness directive (AD) that would have applied to all Safran Helicopter Engines, S.A. (Safran) Model ARRIUS 2F and ARRIUS 2R engines. The NPRM was prompted by a manufacturer investigation that revealed certain high-pressure (HP) turbine blades may contain non-compliant porosity rates due to a change in the manufacturing process. The NPRM would have required replacement of affected HP turbine blades. Since the NPRM was issued, further investigation and tests demonstrated that the non-compliant rate of porosity has no impact on the use limit of the affected parts and the FAA has determined that the unsafe condition no longer exists. Accordingly, the NPRM is withdrawn.

As of June 25, 2025, the proposed rule, which was published in the Federal Register on March 13, 2025 (90 FR 11914), is withdrawn.

You may examine the AD docket at regulations.gov under Docket No. FAA-2025-0341; or in person at the Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD action (withdrawal), the NPRM, the mandatory continuing airworthiness information, any comments received, and other information. The street 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.