Accident Sequence
While en route to the destination airport, the engine lost power and the pilot observed smoke emanating from the front of the airplane. The pilot transmitted an emergency report stating "engine fire...going in" to air traffic control and was provided vectors to the nearest airport. Upon determining that the airport could not be reached, the pilot executed a forced landing to a field. During the landing, the airplane impacted trees, resulting in substantial damage.
Post-Accident Examination
Examination of the engine revealed fire damage on the lower, right, forward cowling near the number 1 cylinder exhaust, as well as soot damage beneath the number 1 cylinder. The number 1 exhaust gasket was intact, with no evidence of exhaust gas leakage observed at that location. However, the number 1 exhaust gas temperature (EGT) probe was found backed out of the exhaust stack by approximately 1/8 inch, and evidence of exhaust gas leakage was noted at the probe.
Engine Data and Fuel Servo Analysis
The engine data monitoring system was analyzed and showed no anomalies during the accident flight. The final recorded data point indicated an abrupt fuel cutoff to the engine. Examination of the fuel servo revealed no preimpact mechanical anomalies.