Data / Federal rules / 2025-20852
Airworthiness Directives; Airbus Helicopters
The Federal Aviation Administration published this proposed rule in the Federal Register on November 25, 2025. Comments closed on January 9, 2026.
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What the agency says
The FAA proposes to supersede Airworthiness Directive (AD) 2025-06-04, which applies to all Airbus Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and EC130T2 helicopters. AD 2025-06-04 requires repetitively inspecting the main gearbox (MGB) bevel wheel and the MGB magnetic plug for particles and performing corrective actions if applicable and prohibits installing an affected MGB unless certain requirements are met. Since the FAA issued AD 2025-06-04, the FAA determined that AD 2025-06-04 contains errors in the interval compliance times. This proposed AD would continue to require the actions of AD 2025-06-04 and revise the interval compliance times. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-20852
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- November 25, 2025
- Comments due
- January 9, 2026
- Dates
- The FAA must receive comments on this proposed AD by January 9, 2026.
- Docket
- Docket No. FAA-2025-5032; Project Identifier AD-2025-01042-R
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 5
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|---|---|---|
| Airworthiness Directives; The Boeing Company Airplanes; Correction 2026-21686 | Final rule | Oct 23 |
| Airworthiness Directives; MD Helicopters, LLC Helicopters 2026-21664 | Final rule | Oct 23 |
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| Airspace Designations; Incorporation by Reference Amendment of FAA Order JO 7400.11M 2026-21422 | Final rule | Oct 20 |
| Airworthiness Directives; Airbus Helicopters 2026-21387 | Proposed rule | Oct 19 |
Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in November 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.