# NTSB OAK69D0052: Mooney M21, N6727U, Palo Alto, CA, June 27, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 27, 1968
- Place: Palo Alto, CA · PALO ALTO, CA
- Location: 37.3965° N, 122.1431° W: Placed by OpenAirDocs: center of Palo Alto, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.3965&lon=-122.1431&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 10, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 109928
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK69D0052
- Page: https://openairdocs.org/ntsb/OAK69D0052

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2097  68/6/27    PALO ALTO,CALIF     MOONEY M21          CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 51, 2800
        TIME - 1030                    N6727U              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 800 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - PALO ALTO
        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
           AIRFRAME - LANDING GEAR: LANDING GEAR WARNING AND INDICATING COMPONENTS
        REMARKS- GR WARNING HORN INOP.
```

## Aircraft

- Registration: [N6727U](https://openairdocs.org/deregistered/N6727U-1971-10-04), registration cancelled 1971-10-04, S/N 2459 (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
- Airport: Palo Alto

## Other investigations on N6727U (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 OAK71AP050](https://openairdocs.org/ntsb/OAK71AP050), May 31, 1971: Mooney M20C (N6727U), Mrkleeville, CA, destroyed, 4 fatal

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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