NTSB Identification: LAX92LA290.
The docket is stored on NTSB microfiche number 46359.
Accident occurred Thursday, July 09, 1992 in WARNER SPRINGS, CA
Probable Cause Approval Date: 06/30/1993
Aircraft: WHIGHAM GW-4, registration: N3705
Injuries: 1 Serious.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
WHILE FLYING OVER MOUNTAINOUS TERRAIN, 7 MILES NORTH OF THE GLIDERPORT, THE GLIDER FLIGHT ENCOUNTERED STRONG DOWN DRAFTS. THE PILOT IMMEDIATELY RETURNED TOWARDS THE GLIDERPORT, BUT ENCOUNTERED STRONGER DOWNDRAFTS AND WAS UNABLE TO CLEAR THE RIDGE. THERE IS NO RECORD THAT THE PILOT OBTAINED A WEATHER BRIEFING BEFORE DEPARTING ON THE ACCIDENT FLIGHT.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: THE PILOT'S INADEQUATE PREFLIGHT PLANNING AND PREPARATION. CONTRIBUTING TO THIS ACCIDENT WAS THE DOWNDRAFTS AND MOUNTAINOUS TERRAIN.
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