In 1945, five American bombers were on a training mission in the same area and were never recovered. The plane sent to find them also vanished on the same day on Dec 5, 1945. A US military flight, Flying Tiger Line Flight 739, disappeared on March 16 1962 over the Western Pacific Ocean near the Philippines. There was no trace of the Lockheed L-1049 Super Constellation airliner chartered by the US military and all 107 aboard were declared missing and presumed dead after almost a year-long search.
In 1947, a British South American Airways flight, with 11 people on board, vanished in the Andes Mountains. 51 years later, Argentinian rock climbers discovered its wreckage and an army expedition later found the human remains as well.
In 1972, an Uruguayan Air Force flight 571 also crashed into the Andes mountains, killing 12 people. While eight survivors were killed in an avalanche few days later, remaining 16 were found more than two months after the aircraft had vanished. An Airbus A-330, operating Air France flight 447 from Rio de Janeiro to Paris, plunged into the Atlantic Ocean in 2009, killing all 228 passengers and crew on board. After five days of search, rescue teams could find the wreck and it took another three years for investigators to unearth that ice crystals had caused the autopilot to disconnect. (PTI)