Incident Overview
A pilot reported a partial loss of engine power during the initial climb following his third touch-and-go landing. In response, he rapidly cycled the carburetor heat on and off and attempted various throttle positions, but the engine did not regain full power. The pilot then performed an emergency landing in an open grassy area off the end of the runway.
Post-Incident Examination
An examination of the aircraft and engine revealed no anomalies. Notably, the weather conditions at the time were favorable for the formation of carburetor ice. This is significant because, according to the report, a flight instructor flying in the traffic pattern approximately 30 minutes before the incident also experienced power degradation, which was corrected by applying carburetor heat.
Context
The pilot had been conducting touch-and-go landings prior to the power loss. The exact aircraft type, registration, and other details were not specified in the source. The pilot was the sole occupant, and no injuries or damage were reported beyond the described power issue.
Conclusion
The source does not explicitly state a probable cause for the partial power loss. However, the absence of mechanical anomalies and the presence of carburetor ice-favorable conditions, along with the earlier instructor's similar experience, suggest carburetor ice may have been involved. No official determination was made in the report.