At 17:52 CDT, a Spezio Sport amateur built airplane struck power lines and then collided with an automobile near Mathis. The two aboard the airplane were killed. One of the occupants of the car suffered serious injuries and the other three had minor injuries. Witnesses traveling on I-37 said the airplane was flying very low to the east before turning to the south over I-37. The airplane was in a continuous descent and the witnesses concluded the airplane was going to land on the southbound lanes of the highway. The landing gear struck a set of power lines running perpendicular to the road, then hit another set and dropped into the northbound lanes of the highway.