Incident Details
A pilot reported that during takeoff, the aircraft began to sink after the flaps were extended and partially retracted. The pilot had set the flaps to "three quarters" and then "milked" them up, but the airplane continued to descend. Despite the throttle being fully forward, the aircraft did not climb. The engine sounded as though it was developing full power throughout the event, up to the moment of impact.
Pilot Account
The pilot stated that he extended the flaps to the three-quarters position during the takeoff roll. After becoming airborne, he began retracting the flaps gradually. However, the airplane began to sink, even though the throttle was pushed all the way in. The pilot reported that the engine sounded normal and was producing full power. As the aircraft continued to sink, the pilot maneuvered to avoid a crowded trailer park and impacted the ground in a soft, muddy open area. The airplane sustained damage from the impact.
Examination Findings
An FAA inspector examined the accident airplane after the event. The inspection revealed no indications of any preaccident failure or malfunction of the airframe, flight controls, or engine. The inspector noted that the flaps were set to approximately 30 degrees at the time of the takeoff.
Flight Manual Specifications
The airplane's flight manual specifies that for a normal takeoff, the flaps should be in the "up" position. The manual does not provide for flap extension during a normal takeoff.