NTSB Identification: SEA02LA076.
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Accident occurred Sunday, April 28, 2002 in Richland, WA
Probable Cause Approval Date: 05/01/2003
Aircraft: Cook RS-15, registration: NONE
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.
The student pilot reported that he was looking for lift to continue the glider operation when the airspeed "got too slow and the tail dropped and the glider went into a flat spin." The student pilot did not recover from the spin and subsequently collided with the terrain. During the post-accident inspection of the wreckage, no evidence of a pre-impact malfunction of the airframe or flight controls were found. The student pilot reported that this was the first flight in this aircraft since it had been restored. The student pilot's flight records indicated that his last flight instructor signoff for solo operations were about six months prior to the accident, and no flights had been accomplished since the last signoff.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: Airspeed was not maintained while maneuvering. An inadvertent stall, remedial action was not attained, and the student pilot's lack of total experience were factors. Full narrative available
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