# NTSB OAK72DVD08: Aero Comdr 560, N777UP, Clayton, CA, August 7, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 7, 1971
- Place: Clayton, CA · CLAYTON, CA
- Location: 37.9403° N, 121.9301° W: Placed by OpenAirDocs: center of Clayton, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9403&lon=-121.9301&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report March 27, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 162853
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK72DVD08
- Page: https://openairdocs.org/ntsb/OAK72DVD08

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2914   71/8/7    CLAYTON,CALIF       AERO COMDR 560      CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 62, 4042
        TIME - 1330                    N777UP              PX-  0  0  3  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 910 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - MT.DIABLO RANCH
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          CLAYTON,CALIF               CLAYTON,CALIF                VACAVILLE,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO EXTEND LANDING GEAR
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - CHECKLIST-FAILED TO USE
        REMARKS- PLT HAD GONE AROUND ON 2 PREVIOUS APCHS DUE CATTLE ON RWY.
```

## Aircraft

- Registration: N777UP (not matched to a registry record)
- Reported make and model: AERO COMDR 560
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Mt.Diablo Ranch

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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