Primary finding
Probable cause
The loss of engine power for undetermined reasons, resulting in a forced landing in the river.
Investigator assessment
Analysis narrative
The student pilot made a touch and go landing and started to climb for another approach. At approximately 800 feet, the engine lost power. The pilot said, ' [i] turned carb heat on...an immediate increase in power [occurred] followed by a drop in power.' the power loss continued, and the pilot made a forced landing in the river. After drying the engine, the FAA was able to run the engine 'smoothly during the run-up period.' no evidence of fuel contamination was found.
Source record
Factual narrative
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