(TWA) Flight 553, registration N1063T, was a McDonnell Douglas DC-9-15 jet airliner operated by Trans World Airlines en route from Pittsburgh to Dayton that collided in mid-air with a Beechcraft Baron (a small general aviation airplane) near Urbana, Ohio on March 9, 1967. All 25 people on board the DC-9 were killed, as was the pilot of the Beechcraft, its sole occupant.