Incident Overview
A pilot reported that during a descent from 10,500 feet mean sea level (MSL) for an approach to Runway 34 Right at Salt Lake City Airport, the engine failed at 8,500 feet MSL. The pilot had previously selected landing flaps and adjusted the mixture to rich and the propeller to high RPM. Following the engine failure, the pilot executed a forced landing on an unfinished section of Interstate 215, approximately one mile south of the airport. During the landing, the landing gear was not fully extended when the aircraft touched down.
Post-Incident Examination
An examination of the aircraft after the incident revealed no evidence of a pre-accident failure or deficiency. An operational check of the engine, including a magneto check at 2,000 RPM, showed no pre-accident problems. The investigation did not determine a specific cause for the engine failure.