# NTSB OAK70D0045: Boeing 75, N56941, Hilmar, CA, July 16, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 16, 1969
- Place: Hilmar, CA · HILMAR, CA
- Location: 37.4085° N, 120.8502° W: Placed by OpenAirDocs: center of Hilmar, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.4085&lon=-120.8502&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 6, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 166568
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70D0045
- Page: https://openairdocs.org/ntsb/OAK70D0045

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3203  69/7/16    HILMAR,CALIF        BOEING 75           CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 31, 2000
        TIME - 0955                    N56941              PX-  0  0  0  FERRY                     TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          YUBA CITY,CALIF             LOS BANOS,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: NORMAL CRUISE
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADES
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           TERRAIN - WET,SOFT GROUND
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
```

## Aircraft

- Registration: [N56941](https://openairdocs.org/aircraft/N56941), registered now, S/N 75-4300 (OpenAirDocs)
- Reported make and model: BOEING 75
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N56941 (3)

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 SEA74FYI05](https://openairdocs.org/ntsb/SEA74FYI05), Jul 19, 1973: Boeing PT-17 (N56941), Malin, OR, substantial damage
- [NTSB OAK66D0293](https://openairdocs.org/ntsb/OAK66D0293), May 13, 1966: Boeing A75 (N56941), Willows, CA, substantial damage
- [NTSB OAK66F0055](https://openairdocs.org/ntsb/OAK66F0055), Jul 21, 1965: Boeing A-75 (N56941), Willows, CA, 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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