ASN Wikibase Occurrence # 374422
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| Date: | Tuesday 12 August 1986 |
| Time: | 08:45 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Helicair Ag., Inc. |
| Registration: | N169HA |
| MSN: | HA-3069 |
| Total airframe hrs: | 2940 hours |
| Engine model: | LYCOMING VO-540-C2A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Salinas, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Agricultural |
| Departure airport: | Salinas, CA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PLT EXPERIENCED A 'RATCHETING' TO THE RIGHT AND A DECREASE IN ROTOR RPM DURING CRUISE FLT AT 75-100 FT AGL. THE PLT MADE AN AUTOROTATION BUT COULD NOT CUSHION THE LANDING DUE TO THE LOW ALT AND LACK OF ROTOR RPM. THE HELICOPTER IMPACTED HARD AND CARTWHEELED. POST ACCIDENT EXAMINATION OF THE HELICOPTER REVEALED THE UPPER HOUSING OIL ORIFICE WAS COMPLETELY BLOCKED WITH A FOREIGN MATERIAL WHICH RESULTED IN OIL STARVATION TO THE SECONDARY PLANET SYSTEM. THE FOREIGN MATERIAL WAS ANALYZED AND FOUND TO CONTAIN 'SIGNIFICANT QUANTITIES OF SILICON'.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB LAX86FVM06
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Mar-2024 09:17 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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