AD Amdt-39-10900
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | 204B | Airworthiness Directives; Bell Helicopter Textron Model 204B, 205A, 205A-1, 205B, and 212 Helicopters |
| aircraft | Bell | Helicopter Textron Model 204B | Airworthiness Directives; Bell Helicopter Textron Model 204B, 205A, 205A-1, 205B, and 212 Helicopters |
Unsafe Condition
Fatigue failure of the main rotor mast or trunnion, leading to separation of the main rotor from the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Create component history cards or equivalent records using a Retirement Index Number (RIN) system. Track increases to the accumulated RIN. Establish a maximum accumulated RIN for certain masts and trunnions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Model 204B, 205A, 205A-1, 205B, and 212 helicopters.
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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