NTSB Identification: LAX90DJA02.
The docket is stored on NTSB microfiche number 41958.
Accident occurred Sunday, December 10, 1989 in HALEIWA, OAHU, HI
Probable Cause Approval Date: 06/30/1992
Aircraft: BRYCE DUSTER BJ-1B, registration: N25601
Injuries: 1 Minor.

THE GLIDER PILOT HEARD A LOUD BANG AND LOST DIRECTIONAL CONTROL WHILE ENTERING DOWNWIND OVER THE OCEAN. HE WAS UNABLE TO MAINTAIN ALTITUDE AND DITCHED INTO THE WATER. EXAMINATION OF THE AIRCRAFT INDICATED THE VERTICAL FIN HAD BROKEN OFF IN FLIGHT AND WAS NOT RECOVERED. THE ATTACHMENT POINT TO THE VERTICAL FIN WOOD STRUCTURE HAD WOOD FIBERS EXPOSING STRAIGHT UPWARDS. CONTROL CONTINUITY WAS ESTABLISHED WITH THE REST OF THE AIRCRAFT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE SEPARATION IN FLIGHT OF THE VERTICAL WOOD FIN FROM THE MAIN STRUCTURE. IT WAS NOT DETERMINED IF THE SEPARATION WAS DUE TO OVERLOAD FORCES OR FATIGUE.

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