We’re still collecting data for this aircraft. Routes appear once we’ve seen it fly enough times.
The National Transportation Safety Board determined that the probable cause of this accident was "the pilot's temporary unresponsiveness for reasons that could not be established from the available information. Contributing to the investigation's inability to determine exactly what occurred in the final minutes of the flight was the lack of a cockpit recorder system with the ability to capture audio, images, and parametric data."
de Havilland DHC-3T · 5 fatalities