The official investigation into the crash by the Interstate Aviation Committee revealed that whilst snow was removed from the aircraft exterior, de-icing fluid was not applied. The crew did not ask for permission to enter the taxiway, which was done at too high a speed for the icy conditions, and the flaps were set to 11 degrees, instead of 20 degrees.
The official inquiry into the crash by the Interstate Aviation Committee found that while snow was cleared from the aircraft's exterior, de-icing fluid was not applied. The crew failed to obtain permission to enter the taxiway at a speed too high for the icy conditions, and the flaps were set to 11 degrees instead of the recommended 20 degrees.