AD 2001-02-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B Helicopters |
Unsafe Condition
Failure of the main rotor mast assembly (part number 204-011-450-001) leading to loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace any main rotor mast assembly, P/N 204-011-450-001, within 25 hours time-in-service. Removed masts must be replaced with an airworthy mast. Alternative methods of compliance may be approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service
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Affected Aircraft
Bell Helicopter Textron Model 204B helicopters with main rotor mast assembly P/N 204-011-450-001 installed, regardless of certification category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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