NTSB Identification: NYC04LA141.
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Accident occurred Wednesday, June 16, 2004 in Warren, VT
Probable Cause Approval Date: 07/07/2005
Aircraft: Schleicher ASK-21, registration: N21VT
Injuries: 2 Minor.

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

After flying for approximately 2 hours, as the pilots were returning to the airport, the wind "went southwest at 5 knots," decreasing the available lift. Approximately 4 miles from the airport, it became apparent that they were too low to make it to the airport, and they chose a field to land in. While on approach to the field, "persistent sink" made attaining the field "marginal," and it became necessary to increase the pitch of the glider to clear a 15-foot tall tree. As a result, the glider stalled and "mushed" to the ground.

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

The pilot's improper pre-flight and in-flight planning, which resulted in a forced landing after experiencing a loss of thermal lift. A factor was the loss of thermal lift.

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