# NTSB OAK70D0055: Foka-4, N225Y, Livermore, CA, June 28, 1969

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 28, 1969
- Place: Livermore, CA · LIVERMORE, CA
- Location: 37.6870° N, 121.7598° W: Placed by OpenAirDocs: center of Livermore, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6870&lon=-121.7598&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 2, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 179369
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70D0055
- Page: https://openairdocs.org/ntsb/OAK70D0055

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2159  69/6/28    LIVERMORE,CALIF     FOKA-4              CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 46, 2007
        TIME - 1300                    N225Y               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 445 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - HUMMINGBIRD HAVEN
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                TAKEOFF: ABORTED
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (OWNER PERSONNEL)
           SYSTEMS - FLIGHT CONTROL SYSTEMS: AILERON AND AILERON TAB CONTROL SYSTEM
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  LATERAL CONTROL PROBLEM
        REMARKS- PLT ABORTED FLT AFTER TOWED T/O DUE TO LACK OF AILERON CONTROL.AILERON CONTROLS NOT CONNECTED.
```

## Aircraft

- Registration: [N225Y](https://openairdocs.org/deregistered/N225Y-2009-07-13), registration cancelled 2009-07-13, S/N W253 (OpenAirDocs)
- Reported make and model: FOKA-4
- Registry model: [Szybowcowy Zaklad Doswiadczaln SZD-24-4A "FOKA"-4](https://openairdocs.org/model/szybowcowy-zaklad-doswiadczaln-szd-24-4a-foka-4) (registry code 8821004) (OpenAirDocs)
- Category: Glider, amateur-built
- Engines: none
- Damage: Substantial damage
- Airport: Hummingbird Haven

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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