The airplane’s encounter with windshear during landing, which resulted in a hard landing and separation of the right main landing gear, and the pilot’s subsequent decision to leave his seat in flight, which resulted in his fall from the airplane.

The pilot's encounter with adverse weather and loss of aircraft control, which resulted in exceeding the aircraft's design stress limits. Factors were the pilot's lack of total experience in the make and model of airplane, and the icing and thunderstorm weather conditions.