Originally Posted by sailingfun

Its not possible. The door appears to have more or less fallen out. There is no apparent damage to the aircraft. The plugs are also as strong or stronger than a door. The overpressure relief valves would also have needed to fail. I bet money in the end the proper fasteners were not in place and the door shifted during unpressurized periods until the lugs were barely engaged leading to the plug loss as the aircraft started to pressurize.