# NTSB OAK78FVM07: Piper PA-31, N59721, San Francisco, CA, December 19, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 19, 1977
- Place: San Francisco, CA · SAN FRANCISCO, CA
- Location: 37.7750° N, 122.4194° W: Placed by OpenAirDocs: center of San Francisco, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.7750&lon=-122.4194&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report March 3, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 143847
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK78FVM07
- Page: https://openairdocs.org/ntsb/OAK78FVM07

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4055  77/12/19   SAN FRANCISCO,CA    PIPER PA-31         CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 1545                    N59721              PX-  0  0  2  COMMUTER AIR CARRIER      31, 3241 TOTAL HOURS, 222
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0  AIR TAXI-PASSG S-D        IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - SAN FRANCISCO INT
        DEPARTURE POINT             INTENDED DESTINATION
          SAN JOSE,CA                 SAN FRANCISCO,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
```

## Aircraft

- Registration: N59721 (not matched to a registry record)
- Reported make and model: PIPER PA-31
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: San Francisco Int

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19771219042139A](https://openairdocs.org/incident/19771219042139A), Dec 19, 1977: Piper PA31350, San Francisco, CA, Substantial damage

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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