Three-engined jet airliner built by De Havilland in the 1960s for short-haul flights as a successor to the Vickers Viscount turboprop design. 117 were built, mainly for British airlines, primarily BEA, and served until the mid 1980s when they were replaced by Boeing 737s and 757s. A BEA Trident was the first commercial flight to make a fully automatic touchdown, at Paris Orly in 1965.