N9339MMooney M20F · 1967

The pilot reported that, while turning from the left base to the final approach leg of the airport traffic pattern, the airplane’s stall warning horn sounded. The pilot pitched the airplane’s nose down and increased engine power. The airplane then “violent[ly]” pitched up and to the left. He continued his attempt to regain control, but the airplane then pitched up and to the right, and eventually impacted terrain about 200 ft short of the runway threshold. The pilot and passenger incurred minor injuries, and the airplane sustained substantial damage to the empennage, both wings, and engine mount. The pilot reported that there were no preimpact mechanical malfunctions or failures of the airplane that would have precluded normal operation.