# NTSB OAK72DVA82: Mooney M-20F, N4093N, Piedra, CA, June 17, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 17, 1972
- Place: Piedra, CA · PIEDRA, CA
- Location: 36.8102° N, 119.3821° W: Placed by OpenAirDocs: center of Piedra, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.8102&lon=-119.3821&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report February 21, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 201451
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK72DVA82
- Page: https://openairdocs.org/ntsb/OAK72DVA82-201451

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2320  72/6/17    PIEDRA,CALIF        MOONEY M-20F        CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 50, 176
        TIME - 1400                    N4093N              PX-  0  0  3  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 21 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - WONDER VALLEY
        DEPARTURE POINT             INTENDED DESTINATION
          SAN JOSE,CALIF              PIEDRA,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           COLLIDED WITH: AUTOMOBILE                                LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      90
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          280                                                       15
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      VFR
        REMARKS- ALSO HIT UNIDENTIFIED PRKD CESSNA,MINOR DMG.
```

## Aircraft

- Registration: [N4093N](https://openairdocs.org/deregistered/N4093N-2006-02-16), registration cancelled 2006-02-16, S/N 680173, built 1968 (OpenAirDocs)
- Reported make and model: MOONEY M-20F
- Registry model: [Mooney M20F](https://openairdocs.org/model/mooney-m20f) (registry code 5870214) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Wonder Valley

## Other investigations on N4093N (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 LAX90FA092](https://openairdocs.org/ntsb/LAX90FA092), Feb 18, 1990: Mooney M20F (N4093N), Galt, CA, destroyed, 2 fatal. Probable cause: THE PILOT FLEW INTO INSTRUMENT CONDITION, BECAUSE SPATIALLY DISORIENTATED AND COLLIDED WITH TERRAIN. FACTOR WAS FOGGY WEATHER CONDITIONS.

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.