# NTSB OAK68D0323: Mooney M18C, N4121, Concord, CA, March 15, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 15, 1968
- Place: Concord, CA · CONCORD, CA
- Location: 37.9722° N, 122.0016° W: Placed by OpenAirDocs: center of Concord, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9722&lon=-122.0016&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 16, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 111639
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK68D0323
- Page: https://openairdocs.org/ntsb/OAK68D0323

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0495  68/3/15    CONCORD,CALIF       MOONEY M18C         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 19, 227
        TIME - 1519                    N4121               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 24 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - BUCHANAN FIELD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           TAXI: FROM LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
```

## Aircraft

- Registration: [N4121](https://openairdocs.org/aircraft/N4121), registered now, S/N 288, built 1953 (OpenAirDocs)
- Reported make and model: MOONEY M18C
- Registry model: [Mooney M-18C](https://openairdocs.org/model/mooney-m-18c) (registry code 5870102) (OpenAirDocs)
- Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Buchanan Field

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.