Flight Details
According to the certified flight instructor (CFI), the flight on September 15, 2003, was a maintenance test flight following the installation of a newly overhauled engine. The airplane logbooks confirmed the engine had been installed that day.
Engine Failure
About 10 minutes into the flight, the CFI reported a partial loss of engine power. Approximately one minute later, the engine lost complete power, and the propeller stopped. The CFI attempted to restart the engine, but these efforts were unsuccessful.
Emergency Landing
As the CFI performed an emergency landing, the airplane collided with the ground.
Post-Accident Examination
Examination of the airplane revealed that an incorrect oil quick-drain valve had been installed on the engine and was found in the open position. Additionally, the vacuum pump drive adapter was missing a security nut. Evidence of engine oil was present inside the engine cowling area.