When was the airliner involved in the crash if TWA Flight 553 last delivered?
TWA Flight 553: Trans World Airlines (TWA) Flight 553 was a McDonnell Douglas DC-9-15 jet airliner, registration N1063T, operated by Trans World Airlines in American airspace en route from Pittsburgh to Dayton. McDonnell Douglas DC-9:  The final DC-9 was delivered in October 1982.
October 1982