Event Summary
Approximately 10 minutes after takeoff, the pilot of an airplane reported a sudden change in the engine rpm gauge and a noticeable loss of power. The pilot informed air traffic control of the problem while at an altitude of about 2,300 feet mean sea level. He then attempted a forced landing in a cornfield. Upon landing, the airplane nosed over and came to rest upside down.
Pilot's Report
The pilot stated that there was a sudden change in the engine rpm gauge and a noticeable loss of power. He communicated the issue to ATC and proceeded with the forced landing.
Wreckage Examination
Examination of the wreckage revealed that fuel was present in the airplane's fuel tanks, indicating that fuel exhaustion was not a factor.
Engine Examination
Examination of the engine found that the oil pump drive gear was sheared. This condition caused oil starvation to the engine, which resulted in a complete loss of power.