AD 73-17-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 204B | Airworthiness Directives; Bell Model 204B and 205A-1 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; Bell Model 204B and 205A-1 Helicopters |
Unsafe Condition
Failure of the tail rotor grips, P/N 204-011-706 or 204-011-728, due to corrosion in the retaining threads and unserviceable condition of the tail rotor grip bearings.
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Required Actions
Remove tail rotor hub and blade assembly, inspect and replace bearings if rough or seized, replace tail rotor grips, and reassemble per maintenance manuals with specified sealant and balancing. Install and track the assembly as per manuals.
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Compliance Time
Within 5 hours time in service after August 20, 1973, for grips with 495+ hours on that date; or prior to 500 hours time in service for grips with less than 495 hours on that date.
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Affected Aircraft
Bell Model 204B and 205A-1 helicopters certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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