Factual error: In the shot where the lady passenger boards the Upper Deck to take her seat, she boards through an aft-facing straight staircase, located at the rear of the cabin. On the 747-200, which they were flying, the majority were equipped with circular staircases, and a few equipped with the aft-facing straight staircases, but in both cases, they were located in the front of the cabin, no exceptions.
Continuity mistake: When the fighter shoots and blows up the truck, there is a shot of the flight attendant (at that moment being strangled by Ray Liotta) sitting in the pilot's seat, looking over her shoulder. It cuts back to the pilot, then back to her being strangled again. Very, very choppy editing.