NTSB Identification: LAX90LA208.
The docket is stored on NTSB microfiche number 42900.
Accident occurred Monday, June 04, 1990 in TRUCKEE, CA
Probable Cause Approval Date: 12/08/1992
Aircraft: SCHWEIZER SGS 1-26B, registration: N2423W
Injuries: 1 Fatal.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE STUDENT GLIDER PILOT RELEASED FROM THE TOW AIRPLANE WITHOUT COMMUNICATING WITH THE TOW PILOT. THE GLIDER PROCEEDED IN A NORTHEAST DIRECTION TOWARD THE LEE SIDE OF THE MOUNTAINS. THE SURFACE WIND WAS FROM THE SOUTHWEST. THE GLIDER WAS OBSERVED AT A LOW ALTITUDE DISAPPEARING OVER A RIDGE. THE AIRCRAFT STRUCK A 50 FT TREE ABOUT 10 FEET FROM THE TOP THEN COLLIDED WITH THE GROUND.

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

THE PILOT'S IMPROPER DECISION TO RELEASE FROM THE TOW AIRPLANE AT AN INSUFFICIENT ALTITUDE ON THE LEE SIDE OF THE MOUNTAINS.

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