# NTSB LAX70FUQ31: Monocoupe 90, N543W, Newhall, CA, May 17, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 17, 1970
- Place: Newhall, CA · NEWHALL, CA
- Location: 34.3847° N, 118.5309° W: Placed by OpenAirDocs: center of Newhall, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.3847&lon=-118.5309&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 1, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 122192
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX70FUQ31
- Page: https://openairdocs.org/ntsb/LAX70FUQ31

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2077  70/5/17    NEWHALL,CALIF       MONOCOUPE 90        CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 42, 8000
        TIME - 1530                    N543W               PX-  0  0  0  FERRY                     TOTAL HOURS, 4 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          EDWARDS AFB,CALIF           SANTA PAULA,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 - IMPROPERLY SECURED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - VIBRATION,EXCESSIVE
           TERRAIN - WET,SOFT GROUND
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  UNUSUAL NOISE
                                  PROP/ENGINE VIBRATION
        REMARKS- PROP BLADE SEPARATED AT GLUE JOINT COVERED WITH FABRIC AT TIP.
```

## Aircraft

- Registration: [N543W](https://openairdocs.org/aircraft/N543W), registered now, S/N 562, built 1930 (OpenAirDocs)
- Reported make and model: MONOCOUPE 90
- Registry model: [Monocoupe 90](https://openairdocs.org/model/monocoupe-90) (registry code 5810102) (OpenAirDocs)
- Registry engine: [Warner SS40&50](https://openairdocs.org/engine/warner-ss40-50) (registry code 64503, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- 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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