The airplane was substantially damaged during impact with trees at 1555 Central time after a loss of engine power during final approach. The commercial pilot and private pilot aboard were killed. Visual conditions prevailed. According to a witness, the accident airplane did “three crow hops” before taking off. It then climbed up and joined the traffic pattern. When the airplane began its turn on to the final approach leg from the left base leg of the traffic pattern, the engine was heard to stop. The airplane was then observed to turn towards the west. It passed over the top of some pine trees and then impacted oak trees. The wreckage revealed no evidence of propeller rotation.