AD 2001-01-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Model 407 | Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters |
| aircraft | Bell | Helicopter Textron Canada Model 407 | Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters |
Unsafe Condition
Tail rotor blades striking the tailboom, which could result in separation of the aft section of the tailboom with the tail rotor gearbox and vertical fin, 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
Reduce the maximum approved never exceed velocity (Vne) to 100 KIAS if an airspeed actuated pedal stop is not installed, or to 110 KIAS if installed. Insert a copy of this AD into the Rotorcraft Flight Manual (RFM). Install a temporary placard on the flight instrument panel to indicate the reduced Vne limit. Install a new redline Vne limit at either 100 or 110 KIAS, as applicable, on all airspeed indicators.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bell Helicopter Textron Canada Model 407 helicopters.
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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