ASN Wikibase Occurrence # 308097
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| Date: | Monday 13 August 1990 |
| Time: | 17:58 |
| Type: |  Bell UH-1B |
| Owner/operator: | OMH Inc. |
| Registration: | N64789 |
| MSN: | 658 |
| Year of manufacture: | 1962 |
| Total airframe hrs: | 5220 hours |
| Engine model: | LYCOMING T53-L11 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | nr. Bieber, California -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Fire fighting |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot was flying a fire fighting mission and was approaching southerly ascending terrain from the east. The aircraft approached the terrain and slowed to make a water drop. As it slowed the tail turned to the left and the helicopter lost altitude and settled into the trees. The pilot heard the low rpm audio and saw the low rpm warning light. He attempted to release the water load.
Examination of the engine and engine components revealed no evidence of a malfunction or failure. The temperature reportedly was between 82 to 86 degrees F with the wind from the north at 5 to 8 knots.
Probable cause and findings
The pilot's failure to maintain aircraft control when intentionally slowing his aircraft to off load water on fire. contributing to the accident was the pilot's failure to arm and release the external load.
Accident investigation:
 |
|
Sources:
NTSB
Revision history:
| Date/time | Contributor | Updates |
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Corrections or additions? ... Edit this accident description
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