Boeing 767

The workhorse of the transatlantic route, the Boeing 767 also claims the curious merit of being the world’s most slender widebody. It made its mark on commercial aviation by pioneering the now-routine Extended Twin Operating Procedures (ETOPS). ETOPS is an International Civil Aviation ruling permitting twin-engined commercial aeroplanes to fly routes that, at some points, are more than 60 minutes flying time from an emergency or diversion airport. The acronym is sometimes facetiously referred to by industry professionals as
“Engine Turns or Passengers Swim”. The first of the breed, the standard ?767-200, made its maiden flight in September 1981, entering service with United Air Lanes the following year. It was the first large commercial aeroplane to use efficiency-enhancing “raked” wingtips. Although the 767 is built mostly of aluminium, weight-
saving composites are used for many components such as control surfaces, engine cowlings, and rear wing panels.
Its unique fuselage cross-section typically seats seven abreast, and the 767’s advanced two-crew fligh deck has an electronic flight instrument system.
Four versions of the 767 followed, two extended-range and two stretched. Indeed, the 767 is the first widebody jetliner to be stretched twice: the 767-300 is 21ft longer than the original 767-200, and the 767-4000ER  is 21ft longer than the 767-300.