AD 74-02-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron, Inc. | 205A-1 | Airworthiness Directives; Bell Model 205A-1 and 212 Helicopters |
| aircraft | Bell Helicopter Textron, Inc. | 212 | Airworthiness Directives; Bell Model 205A-1 and 212 Helicopters |
Unsafe Condition
Cracks or excessive looseness in the tail rotor trunnion bearings could result in tail rotor failure.
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Required Actions
Inspect the trunnion bearing outer races for cracking using a 3 power magnifying glass. Check for axial looseness by grasping the hub assembly and measuring movement with a dial indicator if excessive. Replace bearings showing cracking or over .015 inch axial play per Bell's overhaul manual.
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Compliance Time
within the next 25 hours' time in service after the effective date of this A.D., unless already accomplished within the last 25 hours' time in service, and thereafter at intervals not to exceed 25 hours' time in service from the last inspection
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Affected Aircraft
Bell Model 205A-1 and 212 helicopters equipped with tail rotor hub assembly P/N 212-010-701
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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