ASN Wikibase Occurrence # 287484
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| Date: | Tuesday 14 August 2012 |
| Time: | 08:10 LT |
| Type: |  Bell 47G-2 |
| Owner/operator: | |
| Registration: | N444EH |
| MSN: | 2421 |
| Year of manufacture: | 1959 |
| Total airframe hrs: | 15659 hours |
| Engine model: | Lycoming VO-435 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Flandreau, South Dakota -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Flandreau, SD (4P3) |
| Colman, SD (KPVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that the helicopter lost engine power during cruise flight. He initiated an autorotation; however, the only available landing area was a pasture that resulted in a tailwind approach and landing. The landing from the autorotation was reportedly a 'little rough,†and the helicopter bounced and rolled onto its left side. A postaccident examination revealed that the throttle system did not operate properly. Specifically, the hand grip on the collective throttle control was loose and the throttle cable was not free to move within the conduit. The conduit did not appear to be deformed or damaged in a manner that would have prevented movement of the cable. The throttle conduit was replaced about 3 months before the accident; however, the existing throttle cable was reinstalled with the new conduit. A brief operational test of the throttle system was successfully conducted after that maintenance and the helicopter was subsequently operated for more than 25 hours without incident before the accident occurred.
Probable Cause: A malfunction of the helicopter's throttle system, which resulted in a loss of engine power during cruise flight.
Accident investigation:
 |
|
Sources:
NTSB CEN12LA557
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 11:22 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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