AD 92-27-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. (BHTI) Model 205A-1 and 205B Series Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 205B | Airworthiness Directives; BELL HELICOPTER TEXTRON, INC. (BHTI) Model 205A-1 and 205B Series Helicopters |
Unsafe Condition
Failure of the drive shaft, loss of tail rotor control, and subsequent loss of control of the helicopter.
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Required Actions
Conduct a one-time inspection of the helicopter and drive shaft per specified service bulletins, reassemble the tail rotor drive shaft assembly to ensure 0.50 inch clearance between the drive shaft tunnel and drive shaft, remove unairworthy parts found during inspection and replace with airworthy parts before further flight, and ensure proper clearance each time the starter generator is installed after maintenance.
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Compliance Time
Within 25 hours' time-in-service after the effective date of this AD
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Affected Aircraft
Bell Helicopter Textron, Inc. Model 205A-1 and 205B series helicopters with increased diameter tail rotor drive shaft (P/N 204-040-620-011) installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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