# NTSB LAX76FUG30: Mooney M20C, N6776U, Fontana, CA, January 24, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 24, 1976
- Place: Fontana, CA · FONTANA, CA
- Location: 34.0922° N, 117.4350° W: Placed by OpenAirDocs: center of Fontana, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0922&lon=-117.4350&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 9, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 152557
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX76FUG30
- Page: https://openairdocs.org/ntsb/LAX76FUG30

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1564  76/1/24    FONTANA,CA          MOONEY M20C         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 55, 3500
        TIME - 1025                    N6776U              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 1395 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          SANTA MONICA,CA             PHOENIX,AZ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: OBJECT                                    LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADE RETENTION MECHANISM
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           TERRAIN - OTHER
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- PROP HUB FAILED IN BLADE SOCKET RETENTION THREADS. HIT RAISED CONCRETE PLATFORMS.
```

## Aircraft

- Registration: [N6776U](https://openairdocs.org/aircraft/N6776U), registered now, S/N 2498, built 1963 (OpenAirDocs)
- Reported make and model: MOONEY M20C
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- 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 19760124001979A](https://openairdocs.org/incident/19760124001979A), Jan 24, 1976: Mooney M20C, Fontana, CA, Substantial damage. Prop hub failed in blade socket retention threads. Hit raised concrete platforms.

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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