 It also sends some of its own heavy maintenance work out to other companies, although the vast majority of aircraft and cabin interior work is still carried out by BA Engineering itself.British Airways Engineering was formed from the merger of the engineering divisions of BOAC and BEA's when the two airlines merged in 1974 to form British Airways.Today, British Airways Engineering has hangars at Heathrow (its base), Gatwick, Glasgow and Cardiff airports as well as hundreds of line maintenance stations (engineers located around the world to do minor 'line' maintenance such as routine daily inspections or minor repairs).