AD 96-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Enstrom Helicopter Corporation, The | 280 | Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28A, F-28C, F-28C-2, 280, and 280C Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | 280C | Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28A, F-28C, F-28C-2, 280, and 280C Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28A | Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28A, F-28C, F-28C-2, 280, and 280C Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28C | Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28A, F-28C, F-28C-2, 280, and 280C Helicopters |
| aircraft | Enstrom Helicopter Corporation, The | F-28C-2 | Airworthiness Directives; The Enstrom Helicopter Corporation Model F-28A, F-28C, F-28C-2, 280, and 280C Helicopters |
Unsafe Condition
Failure of the upper and lower swashplate bearings and subsequent loss of control of the helicopter.
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Required Actions
Within 10 hours time-in-service after the effective date, and every 100 hours TIS thereafter, perform visual inspections of upper and lower swashplate bearings for corrosion. Replace unairworthy bearings. Remove and replace bearings with 1,200 hours or more TIS. Install revised bearing housings as terminating action.
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Compliance Time
Within the next 10 hours time-in-service after the effective date, and thereafter at intervals not to exceed 100 hours TIS since the last inspection. Replace bearings before further flight if they have 1,200 hours or more TIS. For bearings with less than 1,200 hours TIS on the effective date, replace on or before attaining 1,200 hours TIS.
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Affected Aircraft
Enstrom Helicopter Corporation Models F-28A, F-28C, F-28C-2, 280, and 280C helicopters manufactured prior to January 1, 1981.
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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