Data / Federal rules / 2025-23100
Airworthiness Directives; Airbus Helicopters
The Federal Aviation Administration published this proposed rule in the Federal Register on December 17, 2025. Comments closed on February 2, 2026.
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What the agency says
The FAA proposes to supersede Airworthiness Directive (AD) 2023-01-04, which applies to all Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350D, AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters. AD 2023-01-04 requires, for helicopters with certain part-numbered tail rotor head (TRH) spider pitch change units installed, inspecting the spider pitch change nut (nut) for correct installation; marking a 2 to 5 mm wide black paint index mark and repetitively inspecting the alignment of the marking; and performing additional inspections and corrective actions if necessary. Since the FAA issued AD 2023-01-04, new or more restrictive airworthiness limitations were issued, which terminated the requirement for the repetitive inspections of the black paint index marking. This proposed AD would require the same actions of AD 2023-01-04, except for the repetitive black paint index marking inspection and would prohibit installing certain parts unless certain requirements are met. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-23100
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- December 17, 2025
- Comments due
- February 2, 2026
- Dates
- The FAA must receive comments on this NPRM by February 2, 2026.
- Docket
- Docket No. FAA-2025-5387; Project Identifier MCAI-2024-00399-R
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 4
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|---|---|---|
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| Airworthiness Directives; MD Helicopters, LLC Helicopters 2026-21664 | Final rule | Oct 23 |
| Airworthiness Directives; General Electric Company Engines 2026-21590 | Final rule | Oct 22 |
| Establishment of Class E Airspace; Havana, IL 2026-21565 | Final rule | Oct 22 |
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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 December 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.