Accident Details
A pilot reported that during a flight from a lake, he took off along the long axis of the lake with a right crosswind. As he turned to the left, the airplane descended rapidly and struck the water in a nose-low, upright attitude.
Witness Observations
Witnesses reported that the seaplane had performed two landings prior to the accident. They described the airplane departing a third time, climbing just above the level of the trees, executing a 'u-turn,' and dropping into the lake. Witnesses stated they heard engine noise until impact.
Pilot Statement
The pilot stated there were no preaccident mechanical anomalies with the airplane. He noted a partial loss of engine power, which he indicated might have been caused by carburetor icing. He stated he did not use carburetor heat.
Meteorological Conditions
The ambient air temperature was 56 degrees Fahrenheit, and the dew point was 45 degrees Fahrenheit.