# NTSB OAK79FVM25: Gee Bee Z, N77VV, Half Moon Bay, CA, June 3, 1979

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: June 3, 1979
- Place: Half Moon Bay, CA · HALF MOON BAY, CA
- Location: 37.4673° N, 122.4399° W: Placed by OpenAirDocs: center of Half Moon Bay, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.4673&lon=-122.4399&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report July 12, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 135679
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK79FVM25
- Page: https://openairdocs.org/ntsb/OAK79FVM25

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1300   79/6/3    HALF MOON BAY,CA    GEE BEE Z           CR-  0  0  1  MISCELLANEOUS             PRIVATE, AGE 54, 11800
        TIME - 1330                    N77VV               PX-  0  0  0  FERRY                     TOTAL HOURS, 35 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HALF MOON BAY
        DEPARTURE POINT             INTENDED DESTINATION
          MERCED,CA                   HALF MOON BAY,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           AIRFRAME - LANDING GEAR: BRAKING SYSTEM (NORMAL SYSTEM)
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
        REMARKS- RIGHT MASTER CYLINDER CONTAMINATED WITH GUMMY DIRT MIXTURE OF FLUIDS FOUND IN BRAKE CYLINDERS
```

## Aircraft

- Registration: [N77VV](https://openairdocs.org/deregistered/N77VV-1997-02-07), registration cancelled 1997-02-07, S/N T4 (OpenAirDocs)
- Reported make and model: GEE BEE Z
- Registry model: [Turner GEE BEE MODEL Z](https://openairdocs.org/model/turner-gee-bee-model-z) (registry code 0565373) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Half Moon Bay

## 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 19790603012139A](https://openairdocs.org/incident/19790603012139A), Jun 3, 1979: Gulstm G44A, Half Moon Bay, CA, Substantial damage. Lost control on landing roll. Ran off side of rwy and flipped over. Defective brakes a factor.

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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