# NTSB OAK67A0028: Balljack 1, N1Y, Livermore, CA, September 4, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 4, 1966
- 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: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report May 1, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 121499
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK67A0028
- Page: https://openairdocs.org/ntsb/OAK67A0028

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0810   66/9/4    LIVERMORE CALIF     BALLJACK 1          CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, AGE 27, 650
        TIME - 1025                    N1Y                 PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 1 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: ACROBATICS
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - EXCEEDED DESIGNED STRESS LIMITS OF AIRCRAFT
           AIRFRAME - WINGS: BRACING WIRES,STRUTS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- RIGHT WING SEPARATED IN-FLIGHT.
```

## Aircraft

- Registration: [N1Y](https://openairdocs.org/deregistered/N1Y-1972-11-15), registration cancelled 1972-11-15, S/N BJ-1Y (OpenAirDocs)
- Reported make and model: BALLJACK 1
- Registry model: [Ballard Thomas Jackson Richard BALLJACK 1](https://openairdocs.org/model/ballard-thomas-jackson-richard-balljack-1) (registry code 05635LH) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed

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.