ASN Wikibase Occurrence # 295235
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| Date: | Friday 12 September 2003 |
| Time: | 08:20 LT |
| Type: |  Bell 47G-3B-1 |
| Owner/operator: | Private |
| Registration: | N48020 |
| MSN: | 2812 |
| Year of manufacture: | 1967 |
| Total airframe hrs: | 7481 hours |
| Engine model: | Lycoming TVO 435B1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Diamond, Oregon -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | Diamond, OR |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During a flight for the purpose of herding horses into a trap, the helicopter was in a hover about 80 feet above ground level. The pilot reported that as he transitioned from the hover to forward flight he noted that the rotor rpm was decaying and the engine rpm increased rapidly. The pilot entered into an autorotation with a rapid descent. The helicopter landed hard, collapsing the main landing skids and the main rotor blades contacted and severed the tail boom. The helicopter came to rest with the engine still running. A wrangler assisted the pilot in turning off the magnetos. Several individuals in the area reported hearing the engine sound go from a normal sound to a high pitch just prior to the collision. An individual who was video taping the activity also captured the sound of the engine go to a high pitch just prior to the sound of the collision. After wreckage recovery, the engine, transmission, clutch and freewheeling systems were inspected and no evidence of a mechanical failure or malfunction was found.
Probable Cause: Loss of engine power for undetermined reasons during hover.
Accident investigation:
 |
|
Sources:
NTSB SEA03LA189
History of this aircraft
Other occurrences involving this aircraft
| 1 December 2002 | N48020 | Bureau Of Land Managment | 0 | Panaca, Nevada | |
sub |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Oct-2022 19:36 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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