# NTSB SEA69F0168: Bell 206A, N4735R, Missoula, MT, December 17, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 17, 1968
- Place: Missoula, MT · MISSOULA, MT
- Location: 46.8721° N, 113.9940° W: Placed by OpenAirDocs: center of Missoula, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.8721&lon=-113.9940&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report August 4, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 192061
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA69F0168
- Page: https://openairdocs.org/ntsb/SEA69F0168

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4890  68/12/17   MISSOULA,MONT       BELL 206A           CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 49, 13000
        TIME - 1023                    N4735R              PX-  0  0  2  POWER/PIPELINE            TOTAL HOURS, 64 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - FUEL SYSTEM: FUEL CONTROL
           POWERPLANT - FUEL SYSTEM: LINES AND FITTINGS
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FUEL CONTROL COMPRESSOR DISCHARGE TUBE BECAME UNSCREWED AND SEPARATED FROM TURBINE GOVERNOR.
```

## Aircraft

- Registration: N4735R (not matched to a registry record)
- Reported make and model: BELL 206A
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage

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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