ASN Wikibase Occurrence # 366928
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| Date: | Wednesday 23 May 1990 |
| Time: | 13:00 LT |
| Type: |  Aerospatiale SA 315B Lama |
| Owner/operator: | Geo - Seis Helicopters, Inc |
| Registration: | N402AH |
| MSN: | 2484 |
| Total airframe hrs: | 6647 hours |
| Engine model: | TURBOMECA ARTOUSE 316B |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | La Sal, UT -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | Durango, CO (KDRO) |
| (NONE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS CONDUCTING LONG LINE OPERATIONS CARRYING A LOAD OF EQUIPMENT PLUS TWO PASSENGERS ON THE LOAD. THE ENGINE DECELERATED TO IDLE NECESSITATING A FORCED LANDING. THE PILOT ALLOWED THE HELICOPTER TO SETTLE UNTIL THE LOAD HIT THE GROUND IN AN ATTEMPT TO PROVIDE SAFETY FOR HIS PASSENGERS. WHEN THE LOAD HIT THE GROUND HE JETTISONED AND THEN ATTEMPTED TO COMPLETE AN AUTOROTATIVE LANDING. LOW ROTOR RPM PREVENTED A SUCCESSFUL LANDING AND THE AIRCRAFT CAME TO REST ON ITS LEFT SIDE. EXAMINATION OF THE ENGINE SHOWED INTERNAL CONTAMINATION OF THE FUEL GOVERNOR.
Probable Cause: A FAILURE OF THE ENGINE SPEED GOVERNOR UNIT DUE TO IMPROPER STORAGE AND/OR INSPECTION OF THE SPEED GOVERNOR UNIT PRIOR TO PLACING IT IN SERVICE. A FACTOR IN THE ACCIDENT WAS THE PILOT CARRYING PASSENGERS ON THE EXTERNAL LOAD.
Accident investigation:
 |
|
Sources:
NTSB DEN90FA115
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 13:38 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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