# NTSB SEA68D0064: Beech 35-B33, N8946M, Westby, MT, June 3, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 3, 1967
- Place: Westby, MT · WESTBY, MT
- Location: 48.8705° N, 104.0571° W: Placed by OpenAirDocs: center of Westby, MT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=48.8705&lon=-104.0571&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report December 6, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 116354
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA68D0064
- Page: https://openairdocs.org/ntsb/SEA68D0064

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3203   67/6/3    WESTBY,MONT         BEECH 35-B33        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 55, 4900
        TIME - 1550                    N8946M              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 550 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: GOVERNORS
           MISCELLANEOUS ACTS,CONDITIONS - DISCONNECTED
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- PROP GOVERNOR CONTROL ARM CAME OFF GOVERNOR SHAFT.
```

## Aircraft

- Registration: [N8946M](https://openairdocs.org/deregistered/N8946M-2013-07-17), registration cancelled 2013-07-17, S/N CD-707, built 1963 (OpenAirDocs)
- Reported make and model: BEECH 35-B33
- Registry model: [Beech 35-B33](https://openairdocs.org/model/beech-35-b33) (registry code 1151406) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N8946M (2)

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.

- [NTSB CHI98LA366](https://openairdocs.org/ntsb/CHI98LA366), Sep 29, 1998: Beech BE-35 (N8946M), Point Lookout, MO, substantial damage. Probable cause: The pilot's continued flight with a known deficiency in equipment. Contributing to the accident was the maintenance adjustment that was not completed by the mechanic.
- [NTSB FTW67D0217](https://openairdocs.org/ntsb/FTW67D0217), Sep 21, 1966: Beech 35 (N8946M), Guymon, OK, 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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