Primary finding
Probable cause
A total loss of engine power due to a fuel delivery system leak, which allowed air to enter the fuel system. The source of the leak could not be determined based on the available evidence.
Investigator assessment
Analysis narrative
The flight instructor reported that while returning from a local training flight, the engine experienced a partial loss of power. An emergency was declared, and the engine subsequently experienced a total loss of power. The flight instructor conducted an emergency off-airport forced landing, during which the airplane impacted a park bench structure before coming to rest on a wide sidewalk. The airplane sustained substantial damage to left wing, and left horizontal stabilizer. A postaccident examination of the engine by an FAA inspector found a significant leak at the fuel flow transducer inlet line/fitting. The fuel flow transducer and associated fuel line were sent to the manufacturer for testing, which revealed no anomalies that would have precluded normal operation.