Schleicher ASW-20B N30WK accident near Cleburne, Texas

Probable cause

Loss of control inflight for undetermined reason.

NTSB analysis

While performing a landing into an open field, the glider pilot experienced a loss of control and impacted terrain. An examination of the wreckage did not reveal any pre-impact anolmalies. A review of the Cambridge Aero Instrument data recording device displayed that after failing to acquire thermal lift, the pilot manuevered for a left base pattern to a grass field. A low level of diphenhydramine, an over the counter sedating antihistamine often known by the trade name Benadryl, was found in the pilot's blood, well below the concentrations normally associated with impairment.

Text from the NTSB. Open the NTSB docket for DFW08LA220 for the full record.