 On 13 May 1986 , Chinook HC Mk1 <unk> crashed in bad weather in the Falkland Islands . The helicopter , with four crew and 12 troops , crashed into a hill 4 miles from its destination . With rescuers hampered by blizzards , the personnel were recovered but one crew member had died shortly after the crash , and the co @-@ pilot and a soldier died on the way to hospital . The board of enquiry concluded that the crew had become disorientated due to " white @-@ out " conditions . 
