Data / Federal rules / 2025-12873
Airworthiness Directives; Airbus Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on July 10, 2025. It took effect on August 14, 2025.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, SA- 365N, and SA-365N1 helicopters. This AD was prompted by reports of loss of tightening torque between the upper ball bearing end and the main rotor (MR) servo-control. This AD requires inspecting the tightening torque and, depending on the results, taking corrective action. This AD also requires reporting information. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-12873
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- July 10, 2025
- Takes effect
- August 14, 2025
- Dates
- This AD is effective August 14, 2025.
- Docket
- Docket No. FAA-2025-0617; Project Identifier MCAI-2024-00331-R; Amendment 39-23075; AD 2025-13-09
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in July 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.