AD 2003-04-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited Model 427 | Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters |
| aircraft | Bell | Helicopter Textron Canada Limited Model 427 | Airworthiness Directives; Bell Helicopter Textron Canada Limited Model 427 Helicopters |
Unsafe Condition
Main rotor blades contacting the top of the fin, causing an upper tuning weight to become loose, which could lead to a main rotor blade striking an auxiliary fin, loss of a tuning weight, impact with a tail or main rotor blade, 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
Modify the auxiliary fin assemblies and revise the Limitations section of the Rotorcraft Flight Manual (RFM) to reduce the never-exceed speed (Vne) for a tail rotor pedal stop failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 427 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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