AD 2000-15-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, and 212 Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, and 212 Helicopters |
Unsafe Condition
Fatigue cracks in the damper clamp splined area of the main rotor mast, specifically in the snap ring groove areas, could result in mast or trunnion failure, separation of the main rotor system, and subsequent loss of control of the helicopter.
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Required Actions
Inspect the snap ring groove area of the mast for inadequate radii and presence of burrs. Reduce the retirement index number (RIN) life limit for the mast and trunnion. Increase the RIN factor for masts and trunnions. Apply standard RIN factors for all external load lifts. Remove from service masts that have been previously installed with a hub spring.
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Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 204B, 205A, 205A-1, 205B, and 212 helicopters, including those with specific serial numbers and those previously installed on military or restricted category 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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