Accident Summary
Approximately eight minutes after departure, the pilot declared an emergency and reported an engine failure. The pilot diverted toward an airport but was unable to reach it, executing a gear-up landing about one mile short of the runway.
Examination Findings
Post-accident inspection of the aircraft revealed that the vacuum pump was not installed on the engine, and no cover plate was present over the mounting opening. Evidence of oil was observed along the right side of the fuselage. The pilot stated that a mechanic, who had removed the vacuum pump, advised that operating the aircraft without the pump would pose no problems.
Engine Teardown
During disassembly, the No. 4 connecting rod was found to have failed. The No. 2 and No. 3 connecting rod bearings were burnt out, while the No. 5 and No. 6 rod bearings were badly scored. The engine oil pump was intact and contained residual oil, with its gears appearing normal. Approximately 1.5 quarts of oil were recovered from the engine prior to disassembly.