ASN Wikibase Occurrence # 361251
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| Date: | Thursday 23 September 1993 |
| Time: | 16:10 LT |
| Type: |  Robinson R-22 BETA |
| Owner/operator: | Tri Valley Helicopters |
| Registration: | N2407X |
| MSN: | 1883 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 1632 hours |
| Engine model: | LYCOMING O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Livermore, CA -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT HAD STABILIZED THE AIRCRAFT IN A HOVER AND WAS DESCENDING FOR LANDING FROM ABOUT 30 FEET AGL. THE ENGINE SUDDENLY LOST POWER AND THE RATE OF DESCENT INCREASED. THE PILOT ATTEMPTED TO ADD FORWARD CYCLIC TO PERFORM A RUNNING LANDING. THE HELICOPTER LANDED HARD IN A LEVEL ATTITUDE COLLAPSING THE SKIDS AND DAMAGING THE ROTORS AND FUSELAGE. INSPECTION OF THE ENGINE PRIMER SYSTEM DISCLOSED THAT THE PRIMER HANDLE WAS UNLOCKED. THE PRIMER HAD UNLOCKED ON THIS HELICOPTER ON TWO PREVIOUS OCCASIONS.
Probable Cause: A partial engine power loss that resulted in a hard landing due to the engine primer system becoming unlocked.
Accident investigation:
 |
|
Sources:
NTSB LAX93LA367
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 16:23 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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