The airplane experienced partial power loss while in the traffic pattern, and landed short of the approach end of the runway at 1634 Pacific time. The solo private pilot was not injured. The airplane sustained substantial damage to both wings and the fuselage. Visual conditions prevailed. The pilot had been doing touch-and-go takeoffs and landings for about an hour. On the accident landing, the engine lost about 600 RPM, and the pilot declared an emergency. The airplane landed about 800 feet short of the approach end of the runway, and went up on its nose.
