Data / Federal rules / 2025-22848
Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on December 16, 2025. It took effect on December 31, 2025. Comments closed on January 30, 2026.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model BO-105A, BO-105C, BO- 105S, BO-105LS A-3, MBB-BK 117 A-3, MBB-BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, and MBB-BK 117 C-1 helicopters. This AD was prompted by a report of a crack found on the fork lever of the mixing lever assembly. This AD requires visually inspecting the fork lever for cracks and the mixing lever assembly for missing components, damage, or corrosion. Depending on the results of these inspections, this AD requires taking corrective action and reporting the results of the inspection to the manufacturer. Lastly, this AD prohibits installing affected fork levers unless certain requirements are met. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-22848
- Type
- Final rule
- Action
- Final rule; request for comments
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- December 16, 2025
- Takes effect
- December 31, 2025
- Comments due
- January 30, 2026
- Dates
- This AD is effective December 31, 2025.
- Docket
- Docket No. FAA-2025-5385; Project Identifier MCAI-2025-01589-R; Amendment 39-23213; AD 2025-25-05
- 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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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.