Accident Overview
During a takeoff from a mountain airstrip, the pilot reported that while climbing just above the trees lining the runway, the airplane encountered an "extreme wind shear and an enormous downdraft." The pilot noted that the airplane began to descend at a rate of 1500 to 2000 feet per minute. In response, the pilot decided to abort the climb and land on the remaining runway.
Landing and Aftermath
The subsequent landing was a hard touchdown, causing the airplane to bounce and then nose over. The accident resulted in substantial damage to both wings, the fuselage, and the empennage.
Pilot Report
The pilot stated that there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
Determination
No probable cause is stated in the source.