Accidents involving pilot error include American Airlines Flight 965 , which crashed into a mountain in Buga , Colombia , on December 20 , 1995 , killing 151 passengers and eight crew members with four survivors , and the mid-air collision of DHL Flight 611 near Überlingen , Baden-Württemberg , Germany , on July 1 , 2002 , with the loss of two on board plus 69 on a Bashkirian Airlines Tupolev Tu-154 . The American Airlines Flight 965 crash was blamed on navigational errors by the crew , while the collision of DHL Flight 611 involved air traffic control errors . Accidents attributed to spatial disorientation due to improperly maintained instruments include Birgenair Flight 301 on February 6 , 1996 , which crashed into the ocean near Puerto Plata , Dominican Republic , with the loss of all 189 passengers and crew , and Aeroperú Flight 603 on October 2 , 1996 , which crashed into the ocean off the coast of Pasamayo , Peru , with the loss of all 70 on board . In the Birgenair accident , investigators found that the aircraft had been stored without the necessary covers for its pitot tube sensors , thus allowing insects and debris to collect within , while in the Aeroperú accident , protective tape covering static vent sensors had not been removed
American Airlines Flight 965
American Airlines Flight 965
Boeing 757