ASN Wikibase Occurrence # 363112
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| Date: | Saturday 15 August 1992 |
| Time: | 07:15 LT |
| Type: | Hiller UH-12E Soloy |
| Owner/operator: | San Joaquin Helicopters, Inc. |
| Registration: | N9753C |
| MSN: | 2340 |
| Total airframe hrs: | 6352 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Arvin, CA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS CONDUCTING AN AERIAL APPLICATION FLIGHT. WHILE EXECUTING THE PROCEDURE TURNAROUND, THE MAIN ROTOR BLADE TENSION TORSION PIN FAILED DUE TO FATIGUE. THIS PART HAS A LIFE LIMIT OF 643 HOURS. THE FAILED PIN ACCRUED 641.5 HOURS. THE PILOT WAS ABLE TO EXECUTE AN AUTOROTATION, BUT WAS UNABLE TO FLARE WHICH RESULTED IN A HARD LANDING.
Probable Cause: THE FAILURE OF THE TENSION TORSION BAR PIN DUE TO FATIGUE. CONTRIBUTING TO THIS ACCIDENT WAS THAT IT WAS NOT POSSIBLE FOR THE PILOT TO FLARE THE HELICOPTER ON LANDING.
Accident investigation:
 |
|
Sources:
NTSB LAX92LA349
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Mar-2024 13:42 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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