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by Someone1234 2315 days ago
It isn't intuitive how aircraft doors work, but the door doesn't open "out" in the typical sense. It actually sits against the aircraft's outer hull, the larger the differential the higher pressure exist between the door and the skin of the aircraft.

When the door is opened, it actually slides in then out sideways rather than swings open.

See: https://en.wikipedia.org/wiki/Plug_door