# NTSB OAK66F0198: Mooney M21, N6766U, Sacramento, CA, March 7, 1966

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: March 7, 1966
- Place: Sacramento, CA · SACRAMENTO, CA
- Location: 38.5816° N, 121.4944° W: Placed by OpenAirDocs: center of Sacramento, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.5816&lon=-121.4944&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 2 uninjured
- Status: Completed, report March 29, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 173871
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK66F0198
- Page: https://openairdocs.org/ntsb/OAK66F0198

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0323   66/3/7    SACRAMENTO CALIF    MOONEY M21          CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 38, 480
        TIME - 2137                    N6766U              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 430 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: NORMAL CRUISE
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: BLADES
           POWERPLANT - PROPELLER AND ACCESSORIES: HUBS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  PROP/ENGINE VIBRATION
        REMARKS- NIGHT OPERATION. INTENTIONAL WHEELS-UP LANDING. ONE BLADE SEPERATED.
```

## Aircraft

- Registration: [N6766U](https://openairdocs.org/deregistered/N6766U-2000-09-05), registration cancelled 2000-09-05, S/N 2488 (OpenAirDocs)
- Reported make and model: MOONEY M21
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N6766U (1)

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 FTW00LA037](https://openairdocs.org/ntsb/FTW00LA037), Nov 28, 1999: Mooney M20C (N6766U), Hillsboro, TX, substantial damage. Probable cause: The pilot's failure to maintain directional control of the airplane during the go-around. A factor was the gust of wind.

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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