Accident Overview
During a personal instrument flight, the pilot encountered thunderstorms and the airplane separated in-flight over Tyringham, Massachusetts. The pilot had obtained a preflight weather briefing and was also advised of a significant meteorological information (SIGMET) during the flight.
Wreckage Examination
Control continuity could not be established due to the fragmentation of the wreckage. However, the separation signatures were consistent with the control surfaces being installed and operational at the time of the breakup. Examination of the airframe, flight controls, and engine did not reveal any mechanical anomalies.
Air Traffic Control Actions
Review of air traffic control (ATC) data revealed that a relief controller had been briefed to turn the accident airplane due to weather. However, the relief controller failed to issue weather information or initiate a flight deviation around known and clearly observed weather, despite very little traffic and a light workload at the time.