Accident Narrative
During the final approach for landing, the pilot reduced engine power. As the aircraft descended below the desired glidepath, the pilot advanced the throttle. However, the engine did not produce additional thrust. The pilot attempted an in-flight restart, which was unsuccessful. The aircraft subsequently landed short of the runway and collided with a dirt embankment.
Post-Crash Examination
Following the accident, a functional test of the engine was conducted. The test revealed no evidence of a mechanical malfunction or failure that would preclude normal engine operation. However, when the engine was configured with the mixture control set for smooth operation, the boost pump in the off position, and the throttle rapidly advanced from a low power setting to full power, the engine failed.