Factual error: The passenger door at the front of a 747 opens outwards and towards the front of the plane (as seen when President Marshall boards the plane). When the first family is being evacuated at the end of the movie, the door is nowhere to be seen.
Suggested correction: That's because Gibbs had blown the emergency lock on the door and it went flying. Now, whether they'd actually do that and risk the door flying through the engine is another story, but I doubt the engineers had a mid-air rescue in mind when they designed it.