ASN Wikibase Occurrence # 315338
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| Date: | Thursday 23 September 2021 |
| Time: | 14:00 LT |
| Type: | Hiller UH-12E Soloy |
| Owner/operator: | Western Helicopter Services |
| Registration: | N5334V |
| MSN: | 2008 |
| Year of manufacture: | 1959 |
| Total airframe hrs: | 21096 hours |
| Engine model: | Rolls Royce 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bovill, Idaho -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Bovill, ID |
| Bovill, ID | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter was performing an aerial application flight. While approaching the fertilizer service truck to refill the bucket, the pilot felt a 'sudden jolt,â and the helicopter lost altitude. The pilot was unable to regain control, and the helicopter did not yaw after the jolt. The helicopter subsequently impacted the terrain below. The helicopter sustained substantial damage to its main rotor blades and fuselage. Before the pilot could exit the helicopter, 'everythingâ on the helicopter, including the engine, automatically shut down.
Postaccident examination of the wreckage, including the engine, revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. Also, the examination yielded no evidence to explain why the engine automatically shut down after the accident. As a result, the reason for the pilot's loss of helicopter control could not be determined based on the available evidence for this accident investigation.
Probable Cause: A loss of helicopter control for undetermined reasons based on the available evidence for this accident.
Accident investigation:
 |
|
Sources:
NTSB WPR21LA354
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Jun-2023 13:29 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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