ASN Wikibase Occurrence # 354500
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| Date: | Saturday 9 May 1998 |
| Time: | 17:55 LT |
| Type: |  Bell UH-1H |
| Owner/operator: | Pierce County Sheriff's Dept |
| Registration: | N345SC |
| MSN: | 66-16345 |
| Year of manufacture: | 1966 |
| Total airframe hrs: | 6821 hours |
| Engine model: | Lycoming T53L13BA |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Naches, WA -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that shortly after takeoff, he noticed that the rpm was low, as if it were bleeding off. The pilot tried to increase the rpm by using the increase/decrease button on the collective which had no effect. The pilot opted to reverse direction to return to land. The rpm continued to decrease and the pilot initiated an autorotation to a field in a narrow valley. The rpm continued to decay to a point in which the pilot could not perform a normal autorotation due to low airspeed and altitude. The helicopter landed hard and rocked forward onto it nose before settling back on the skids. The engine was removed and sent to a facility for a test run. During the engine run, there were no anomalies found that effected engine operation.
Probable Cause: Loss of engine power for undetermined reasons.
Accident investigation:
 |
|
Sources:
NTSB SEA98TA074
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 15:13 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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