ASN Wikibase Occurrence # 366832
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| Date: | Wednesday 6 June 1990 |
| Time: | 17:30 LT |
| Type: |  Enstrom F28C |
| Owner/operator: | Private |
| Registration: | N51729 |
| MSN: | 420 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 795 hours |
| Engine model: | LYCOMING HIO-360-E1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Camas, WA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Ferry/positioning |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE OWNER OF THE ENSTROM HELICOPTER, WHICH WAS OUT OF ANNUAL INSPECTION LIMITATIONS, ELECTED TO FLY IT OFF A TRAILER IN ORDER TO REPOSITION IT FOR MAINTENANCE PRIOR TO A FERRY FLIGHT. AT ABOUT FIFTY FEET, HE HEARD A LOUD NOISE, THE ENGINE SPEED INCREASED, AND THE ENGINE BECAME DISENGAGED FROM THE ROTOR DRIVE SYSTEM. AN AUTOROTATION WAS MADE, BUT THE HELICOPTER SUSTAINED SUBSTANTIAL DAMAGE. THE OWNER STATED HE BELIEVED THAT THE SPRAG CLUTCH FAILED.
Probable Cause: THE FAILURE OF A SPRAG CLUTCH IN THE ROTOR-DRIVE MECHANISM, AT AN ALTITUDE AND POSITION THAT PRECLUDED OR LIMITED THE POSSIBILITY OF A SUCCESSFUL OUTCOME.
Accident investigation:
 |
|
Sources:
NTSB SEA90LA116
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 12:39 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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