Incident Summary
Shortly after takeoff with four skydivers on board, the aircraft's engine seized at an altitude of approximately 300 to 400 feet. The pilot selected the best available landing area, a field of tall corn on rolling terrain. During the emergency landing, the aircraft nosed over.
Post-Accident Examination
After the accident, the engine was disassembled for examination. Approximately one quart of finely ground ferrous material was found deposited in the lower oil pan. The main bearings were scored and discolored, and the main bearing shells showed evidence of overheating. The connecting rods were also discolored from heat. The screen chamber of the oil pump was found full of ferrous metal, which had shut off the oil supply to the oil pump gears.
Inspector's Findings
A Federal Aviation Administration maintenance inspector who examined the engine stated that the ferrous material found in the engine and bottom pan was not from the engine. The source of the material was not determined.
Conclusion
The investigation documented the condition of the engine and the presence of foreign ferrous material, but no determination was made regarding the origin of the contamination.