The airplane collided with the ground following a loss of engine power while maneuvering during an air show performance at about 1500 Central time. The commercial pilot and passenger sustained serious injuries. A post-accident fire partially consumed the fuselage. Visual conditions prevailed. The airplane was maneuvering when its engine lost power. The passenger, a wingwalker, was on top of the wing at the time the engine experienced the problem. The wingwalker immediately entered the forward cockpit seat and the pilot initiated a forced landing. The airplane impacted the ground adjacent to the runway. The pilot observed no unusual indications on the engine instruments prior to the loss of engine power. An unspecified amount of fuel was noted in the center wing fuel tank.
