AD 2001-13-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Various | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A-1, 205B, 212, 412, 412EP, and 412CF Helicopters |
| aircraft | Bell | Helicopter Textron | Airworthiness Directives; Bell Helicopter Textron, Inc. Model 205A-1, 205B, 212, 412, 412EP, and 412CF Helicopters |
Unsafe Condition
Failure of the tail rotor counterweight bellcrank retention nut, which could result in the bellcrank migrating off the crosshead spindle, loss of tail rotor control, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove each existing tail rotor counterweight bellcrank retention nut and replace it with a zero hours time-in-service (TIS) retention nut. Inspect the retention nuts and corrosion preventive compound (CPC) coating at intervals not to exceed 100 hours TIS. Replace any retention nut with corrosion, mechanical damage, a crack, or looseness with an airworthy new retention nut before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 100 hours time-in-service (TIS) or 90 days after the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron, Inc. Model 205A-1, 205B, 212, 412, 412EP, and 412CF helicopters, certificated in any category.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.