ASN Wikibase Occurrence # 361424
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| Date: | Wednesday 25 August 1993 |
| Time: | 10:10 LT |
| Type: |  Bell 47G-5 |
| Owner/operator: | Gordon Patterson |
| Registration: | N1464W |
| MSN: | 7933 |
| Year of manufacture: | 1969 |
| Total airframe hrs: | 14257 hours |
| Engine model: | LYCOMING VO-435-BIA |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fulton, WI -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AS THE HELICOPTER WAS LIFTING OFF AN ELEVATED STAND ON A LOADING TRUCK, THE PILOT HEARD A LOUD BANG FOLLOWED BY A LOSS OF ENGINE POWER. THE PILOT USED THE ROTOR INERTIA TO GUIDE THE HELICOPTER AWAY FROM THE STAND AND TRUCK WHEN THE HELICOPTER DESCENDED INTO AND COLLIDED WITH THE TERRAIN. SUBSEQUENT INVESTIGATION REVEALED A FRACTURED INTAKE VALVE RETAINER (KEEPER) IN THE NUMBER ONE CYLINDER.
Probable Cause: the failure (fracture) of the number one cylinder intake valve retainer (keeper).
Accident investigation:
 |
|
Sources:
NTSB CHI93DEP05
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 18:17 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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