Event Summary
During a solo training flight intended for touch-and-go takeoff and landing practice, a student pilot completed a normal takeoff and traffic pattern. After a normal landing, the pilot retracted the flaps, applied full throttle, and advanced the mixture control partially forward, leaving it about 7/8 inch out from the full-rich position. The airplane lifted off the runway, climbed to approximately 50 to 100 feet above ground level (agl), and attained an airspeed of about 60 knots. However, the airplane could not maintain this airspeed, and the student pilot suspected the engine was producing only partial power. The pilot then performed a precautionary landing in an open field, during which the airplane landed hard.
Flight Details
The purpose of the solo flight was for the student pilot to practice touch-and-go takeoff and landings. The initial takeoff and landing were normal. During the landing rollout, the pilot configured the airplane for takeoff by retracting flaps and applying full throttle, with the mixture set partially forward. After becoming airborne, the airspeed could not be sustained, prompting the precautionary landing in the field.
Post-Accident Examination
Examinations conducted by the operator and a Federal Aviation Administration (FAA) inspector found no evidence of engine or airframe anomalies that would have precluded normal operation. The FAA inspector observed that the spark plug signatures indicated a very lean fuel mixture. An engine run performed the day after the accident revealed no discrepancies.