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| Date: | Wednesday 29 July 1987 |
| Time: | 09:50 LT |
| Type: |  Bell 204B |
| Owner/operator: | Bill Williams-southern Aero |
| Registration: | N4580Y |
| MSN: | 2066 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 4000 hours |
| Engine model: | Lycoming T-53-L13B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Dubois, WY -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE COMMERCIAL PLT WAS PERFORMING EXTERNAL SLING LOADS IN SUPPORT OF SEISMIC OPERATIONS. THE PLT REPORTED THAT THE ENGINE FAILED DURING A LOAD RELEASE AND THE PLT EXECUTED AN AUTOROTATION. THIS RESULTED IN A HARD LANDING IN HEAVY TIMBER ON SLOPING TERRAIN. THE HELICOPTER ROLLED OVER ON THE RIGHT SIDE. A POST ACCIDENT ENGINE INSPECTION REVEALED NO PREIMPACT MECHANICAL MALFUNCTIONS /FAILURES.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB DEN87LA199
History of this aircraft
Other occurrences involving this aircraft
| 16 April 1997 | N4580Y | U.s. Forest Svc./state Of Tn. | 0 | near Calderwood, TN | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Mar-2024 18:06 | ASN Update Bot | Added |
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