What happened
The aircraft was on final approach to the Rolla, Missouri airport when the pilot reported switching the fuel tank selector from the right tank to the both position in preparation for landing. The pilot stated that he did not know which direction he moved the fuel selector valve. The engine lost power and would not respond to throttle movement. The pilot executed a forced landing but did not have adequate altitude to maneuver to the runway. The aircraft impacted approximately 150 yards short of the runway.
The investigation
The fuel selector was found in the off position. The aircraft engine was examined and run in a test cell. All engine parameters were within normal limits.