Pilot error resulting in controlled flight into terrain was blamed for five fatal Comet 4 accidents : an Aerolíneas Argentinas crash near Asunción , Paraguay , on 27 August 1959 , Aerolíneas Argentinas Flight 322 at Campinas near São Paulo , Brazil , on 23 November 1961 , United Arab Airlines Flight 869 in Thailand 's Khao Yai mountains on 19 July 1962 , a Saudi Arabian Government crash in the Italian Alps on 20 March 1963 , and United Arab Airlines Flight 844 in Tripoli , Libya , on 2 January 1971 . The Dan-Air de Havilland Comet crash in Spain 's Montseny range on 3 July 1970 was attributed to navigational errors by air traffic control and pilots . Other fatal Comet 4 accidents include a British European Airways crash in Ankara , Turkey , following instrument failure on 21 December 1961 , United Arab Airlines Flight 869 during inclement weather near Bombay , India , on 28 July 1963 , and the terrorist bombing of Cyprus Airways Flight 284 off the Turkish coast on 12 October 1967
United Arab Airlines Flight 869
United Arab Airlines Flight 869 (1963)
De Havilland Comet