Incident Sequence
The pilot reported that the aircraft had high oil temperature and moderate vibrations. Following this report, the aircraft was landed at Sand Point. A company mechanic arrived to inspect the aircraft. The mechanic checked the oil quantity and performed a run-up. According to the mechanic, no problems were found, and the aircraft was released for flight.
Departure and Engine Failure
The aircraft had just departed the runway. Shortly after liftoff, at approximately 50 feet above mean sea level, the engine quit. The aircraft then crashed into the water about 300 feet from shore.
Post-Crash Situation
After the accident, the aircraft sank into 80 to 90 feet of water. The aircraft was not recovered.