Departure and Initial Climb
According to the pilot, after a runup during which the mixture was 'leaned', the aircraft departed from Runway 25 at Big Bear Airport. The pilot stated that the nose of the aircraft was lowered to 'gain 80 kts IAS,' and that the aircraft 'climbed to approximately 150 to 200 ft above the lake and would climb no higher.'
Descent and Impact
The aircraft then 'began a gradual descent' and struck the water at '60 kts in what seemed like a level attitude.'
Investigation Findings
Investigation revealed that the aircraft was at least 294 lbs over gross weight. The density altitude was computed to be 8,352 ft when using 60 degrees F as a value. The recorded temperature 15 nautical miles away was 86 degrees F. No pre-impact discrepancies were found during the examination of the aircraft wreckage or the subsequent engine test.