AD 93-24-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Enstrom Helicopter Corporation, The | 280C | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | 280F | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | 280FX | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28C | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28C-2 | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28F | Airworthiness Directives; THE ENSTROM HELICOPTER CORPORATION Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX Series Helicopters |
Unsafe Condition
Failure of the trim motor relay could result in full deployment of the trim system, high cyclic control forces, and loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 5 hours' time-in-service after the effective date, inspect the trim system per SDB 0082 Rev A, rewire the trim system and replace the circuit breaker per paragraph 5.3 of SDB 0082. Verify proper operation after rewiring. Inspect at intervals not exceeding 100 hours' TIS or annual inspection. Replace unairworthy parts.
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Compliance Time
Within the next 5 hours' time-in-service after the effective date of this AD
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Affected Aircraft
Enstrom Helicopter Corporation models F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX series helicopters equipped with a 24 volt D.C. electrical system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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