1963 Skymaster heading out for a demo flight. While doing missionary work (N538JP), this 336 later crashed during landing at Coban, Guatmala July 31, 2008. A mechanical failure in the flap system caused it to roll nearly inverted and while the pilot quickly retracted the flaps and corrected the roll, the engines had quit and the aircraft impacted a wooded hillside. There were no injuries and five people walked away from the wreck.