Piper PA28R N33305 accident near Easton, Maryland

Probable cause

The loss of engine power for reasons that could not be determined because postaccident engine examination and testing revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation.

NTSB analysis

The flight instructor and pilot were on a flight to resume the pilot's instrument training. After performing maneuvers and several touch-and-go landings, the pilots elected to perform a practice instrument approach to the destination airport. While on the approach, they configured the airplane for landing. The flight instructor noted that the airplane was below the glideslope and asked the pilot to increase engine power; however, the engine did not respond to the throttle input. The flight instructor took the controls and attempted to restore engine power without success. The propeller continued to windmill, the pilot switched fuel tanks, and the engine did not restart. The flight instructor performed a forced landing in a nearby field, during which the fuselage was substantially damaged. During recovery from the field, fuel was drained from both fuel tanks, and no water or debris was noted in the fuel. An examination of the engine revealed crankshaft and valvetrain continuity throughout the engine. The propeller was rotated through 360° of motion, and compression and suction were noted on all cylinders. In addition, fuel was plumbed into the engine, and the engine was started and ran smoothly without hesitation. The engine power was decreased to idle power, and then the engine was shut down. There were no mechanical malfunctions or failures noted with the engine that would have precluded normal operation before the accident. The reason for the loss of engine power could not be determined.

Text from the NTSB. Open the NTSB docket for ERA19LA160 for the full record.