The airplane was on initial climb-out at 1440 Eastern time when the lower half of the main cabin door came open. The pilot reversed course and returned to the departure airport. The right main tire blew out on the landing roll. The airplane went off the right side of the runway, struck a tree, caught fire and came to a complete stop. Visual conditions prevailed. The commercial pilot and five passengers were not injured but the airplane received substantial damage. The flight was operated under FAR Part 135.
