AD 2001-13-02
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
Pilots have difficulty distinguishing between the FADEC Fail horn, the Engine Out horn, and the Low Rotor RPM horn, which could cause an inappropriate pilot response leading to engine overspeed and uncommanded reduction to flight-idle engine power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace the FADEC Fail horn (SC648S to VSB628CP), Low Rotor RPM horn (SC628 to SC628N), and Engine Out horn (SC628P to SC628NP). Install the specified terminal junctions (M81714/65-22-11) in accordance with Bell Helicopter Textron Alert Service Bulletin No. 407-97-12.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 90 calendar days, unless accomplished previously.
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Affected Aircraft
Bell Helicopter Textron Canada Model 407 helicopters, serial numbers 53000 through 53194, 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
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