# NTSB DEN77DTC21: Aerospatial SA315B, N6390, Wilson, WY, July 31, 1977

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 31, 1977
- Place: Wilson, WY · WILSON, WY
- Location: 43.4753° N, 110.9146° W: Placed by OpenAirDocs: center of Wilson, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.4753&lon=-110.9146&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 28, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 145438
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN77DTC21
- Page: https://openairdocs.org/ntsb/DEN77DTC21

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3543  77/7/31  NR.WILSON,WY          AEROSPATIAL SA315B  CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 43, 5981
        TIME - 1000                    N6390               PX-  0  0  0  AIR TAXI-CARGO            TOTAL HOURS, 1010 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         WILSON,WY                    LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - COMPRESSOR ASSEMBLY: BEARING,ROTOR SHAFT
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - HIGH VEGETATION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- CAUSE OF BEARING FAILURE NOT DETERMINED.
```

## Aircraft

- Registration: N6390 (not matched to a registry record)
- Reported make and model: AEROSPATIAL SA315B
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19770731028189A](https://openairdocs.org/incident/19770731028189A), Jul 31, 1977: Aerosp SA315B, Wilson, WY, Substantial damage. Cause of bearing failure not determined.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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