Japan Airlines Flight 123 was a scheduled domestic Japan Airlines passenger flight from Tokyo 's Haneda Airport to Osaka International Airport , Japan . On August 12 , 1985 , a Boeing 747SR operating this route suffered a sudden decompression twelve minutes into the flight and crashed in the area of Mount Takamagahara , Ueno , Gunma Prefecture , 100 kilometres ( 62 miles ) from Tokyo thirty-two minutes later . The crash site was on Osutaka Ridge , near Mount Osutaka China Northwest Airlines Flight 2303 lost control during take-off from Xi'an , China . The aircraft , a Tupolev Tu-154 , had maintenance carried out before its flight , and the autopilot yaw-channel had been erroneously connected to the bank control , and vice versa . Additionally , this incorrect maintenance was not done in a properly approved facility . When the pilot engaged the autopilot , the aircraft began to oscillate violently . Any attempts to rectify matters only made things worse , as the plane shook itself to pieces , breaking up in midair before the crew could react , killing all on board
China Northwest Airlines Flight 2303
China Northwest Airlines Flight 2303
Loss of control (aeronautics)