AD Amdt-39-9224
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A, 205A-1, and 204B Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A, 205A-1, and 204B Helicopters |
Unsafe Condition
Failure of the 42-degree gearbox due to cracks at the roots of the gear teeth on the pinion and gear of affected 42-degree tail rotor drive gearbox assemblies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Verify tail rotor control system rigging per maintenance manual; perform fluorescent penetrant inspection for cracks on 42-degree gearbox pinion and gear teeth roots, replace components if cracks found; create component history card to track torque events (takeoffs or lifts).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 205A, 205A-1, and 204B helicopters with affected 42-degree tail rotor drive gearbox assemblies.
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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