This year in aviation history: A Turkish Airlines DC-10 named Ankara (tail number TC-JAV, operating as Turkish Airlines 981) crashes shortly after takeoff from Orly International Airport in Paris. The culprit is a cargo door that was designed to swing outwards, done so to maximize usable cargo space. The worn out locks (which rarely worked properly) allow the door to swing open from the pressurization with enough force to pass its safety stops, hitting the side of the fuselage and caving in part of the floor. Six occupied seats are sucked out of the plane, and the collapsed floor cuts off all tail-mounted controls, causing the plane to nose down. The speed picked up from the dive breaks the plane apart mid-air.
This accident is notable for two things:
1) It's the third highest death toll (and was the worst at the time) of any aviation accident, with 346 fatalities.
2) A 'smoking gun' memo from contractor Convair highlighted Convair's concerns with the cargo door and latches, and explained with frightening accuracy what would happen if the latches were to fail. This memo went ignored by manufacturer McDonnell-Douglas, leading to the largest civil lawsuit at the time.
Note for point 2: An American Airlines DC-10 suffered a similar cargo door failure almost two years earlier. By pure chance, the collapse of the floor did not sever all of their controls, nor did any seats get lost to the hull breach, and the plane landed safely.
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