Accident Overview
During the initial climb after takeoff, the engine experienced a partial power loss. The pilot initiated a turn to land on runway 10R but was unable to reach the designated landing area. Subsequently, the aircraft made a wheels-up landing short of the runway.
Engine Inspection
An inspection of the engine revealed evidence of detonation or preignition in the number four cylinder. This condition was identified during the post-accident examination.
Previous Flight Issues
Another pilot, who had operated the airplane on the preceding flight, reported that while returning from a long flight, the engine began to vibrate and both the oil temperature and cylinder head temperature rose above the red line. After landing, that pilot notified the operator. The operator reported that a new set of spark plugs were installed after that flight, and the engine subsequently ran fine.
Conclusion
No further details or causal analysis are provided in the source material.