Data / Federal rules / 2025-06121
Airworthiness Directives; Bell Textron Canada Limited Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on April 10, 2025. It took effect on April 25, 2025.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (Bell) Model 505 helicopters. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these helicopters. This AD was prompted by deformation and/or improper pin engagement in the knuckles of the door hinge on the aft movable ballast box assembly. This AD requires removing all ballast weights from the aft movable ballast box assembly and prohibits the use of ballast weights within the aft movable ballast box assembly, as specified in a Transport Canada emergency AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2025-06121
- Type
- Final rule
- Action
- Final rule; request for comments
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- April 10, 2025
- Takes effect
- April 25, 2025
- Dates
- This AD is effective April 25, 2025. Emergency AD 2025-06-51, issued on March 21, 2025, which contained the requirements of this amendment, was effective with actual notice.
- Docket
- Docket No. FAA-2025-0486; Project Identifier MCAI-2025-00348-R; Amendment 39-23007; AD 2025-06-51
- 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 April 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.