Accident Overview
Shortly after takeoff, the pilot experienced an inflight fire and subsequent engine failure. Unable to reach a clear area, the pilot performed an emergency landing into trees. The aircraft came to rest among the trees, and the incident was investigated by authorities.
Investigation Findings
Examination of the aircraft revealed that the fire had initiated in the area of the muffler and carburetor. The muffler showed signs of wrinkling and cracking, which were attributed to severe oxidation and normal heat expansion over time. Analysis of exhaust deposits on the crack surfaces and the exterior skin of the muffler indicated that the muffler had been cracked for some time prior to the accident.
Maintenance History
The aircraft had undergone an annual inspection 278 flight hours before the accident, but it had not been inspected for the three years preceding that last inspection. Records showed no evidence that the muffler had ever been overhauled or replaced during the aircraft's total history of 2,650 hours. The manufacturer recommends muffler replacement every 1,000 flight hours.