ASN Wikibase Occurrence # 366566
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| Date: | Monday 16 July 1990 |
| Time: | 10:30 LT |
| Type: |  Sikorsky S-58BT |
| Owner/operator: | Skyline Helicopters |
| Registration: | N439DS |
| MSN: | 58-658 |
| Engine model: | P&W T400-CP-400 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ovando, MT -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | Canyon Creek, MT |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING AN EXTERNAL LOAD LOGGING OPERATION, THE PILOT HAD JUST TAKEN OFF FROM REFUELING AND WAS PREPARING FOR ANOTHER LOAD PICK- UP WHEN THE NUMBER ONE ENGINE LOST POWER AND FLAMES WERE OBSERVED SHOTTING OUT FROM THE EXHAUST. THE PILOT TRIED TO FLY THE HELICOPTER ON ONE ENGINE TO A LANDING AREA, HOWEVER, RPM WAS DROPPING. THE PILOT INITIATED AN AUTOROTATION WHICH RESULTED IN A HARD LANDING.
Probable Cause: THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.
Accident investigation:
 |
|
Sources:
NTSB SEA90LA137
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2024 09:51 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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