Corrected entry: Right before The Windsor flight crashes, the stewardess tells two passengers that they've made arrangements so they would make their next flight. Obviously this could only be done with communication with the ground. If they had sky phones the tower would have called them to warn what was happening.
Corrected entry: Colonel Stewart and his men arrive at the airport in a helicopter. So, where do they get the Army truck they drive around in?
Corrected entry: At the end of the film when the planes begin landing there is no reason for the planes to deploy emergency chutes and send the passengers outside into the snow. All aircraft landed safely without incident. They were simply low on fuel. Planes only evacuate if there is impending danger to passengers by remaining on board.
Corrected entry: When McClane's wife is thinking about using the phone to call, there is a shot of the phone. Behind the phone, you can see a circular staircase. The aircraft she is on, an L1011 TriStar, has only one passenger deck. (01:23:20)
Corrected entry: Since the terrorists have implausibly taken over all the radios at the airport, the good guys use the marker beacons to communicate with the airplanes. Even if they could be modified to talk rather than beep, marker beacons (outer, middle and inner) are on the approach path of a runway, and only transmit to an aircraft as it passes overhead. The signal is only picked up by an aircraft's marker beacon receiver, if so equipped. There is not enough time to get a message. Nor could a marker beacon be used to broadcast to a large number of airplanes. The outer marker is only 5 miles from the airport. At most, one airplane would be holding over the outer marker. (01:04:45 - 01:06:10)
Corrected entry: The interior of the plane which is deliberately crashed by the terrorists is of a BAC 1/11. I do not know any airline in the world which would choose to send a BAC 1/11 over the Atlantic from Europe due to it only being able to carry a limited number of passengers and short range capabilities.
Corrected entry: It is not possible that a Heckler & Koch MP5 repeats with blank rounds as seen during the fight at the church. An automatic weapon, such as an MP5, repeats with gas pressure, which only is strong enough when a bullet is in the barrel.
Corrected entry: When Willis is trapped in the plane by the terrorists he escapes by using the ejector seat - however the plane is a C-132 (at least the body of a C-123, with studio-designed wings) and these planes don't have ejector seats.
Corrected entry: At the beginning of the fight scene on the 747 wing, the door swings opens as if on simple hinges like a screen door. Boeing uses plug doors, a design where the entire door has to move inwards several inches before moving outwards.
Corrected entry: When the terrorists are about to take off, McClane, before falling off the wing, releases a fuel valve, yet Stuart does not notice. However, the General flying the plane does not notice either. Since the stream of fuel is considerably strong, wouldn't there be a warning indicator in the cockpit?
Corrected entry: Throughout the film the exceptionally poor visibility is repeatedly refered to. In the scene where McClane is trying to prevent the aircraft crashing by waving flaming torches in the air the Controller can recognise him from the Control Tower through a small set of binoculars despite the facts that 1) it is dark, 2) it is snowing, 3) they have only met once before and 4) McClane is wearing a borrowed Airport coat. Even from the end of the runway where McClane is standing at its closest point to the Tower this would be impossible.
Corrected entry: When John, the airport police captain and his brother are in the car about to go to the hanger the car pulls out and hits the cab there is an external shot of the crash you see that the wind screen shatters but when the camera goes to the bonnet the wind screen is still intact.
Corrected entry: Bruce calls his wife and finds out that she should be landing soon. We then see the journalist from the first film making a huge fuss about being moved from first class, where he has been sitting for the entire journey. He hadn't been in Holly's compartment before due to his reaction when he first sees her. Why did they only just move him when the plane was about to land? He was sitting in first class the whole journey with no problem. Surely ten more minutes wouldn't hurt?
Corrected entry: John Amos plays an Army Major, and says that he taught William Sadler's Colonel Stuart "everything he knows." Well, this doesn't make any sense, especially if they are both from Special Forces units. Unless Stuart went through SF selection late in his career, he would not be getting instructed by someone two grades below him.
Corrected entry: The noise of the big English aircraft exploding should be heard far from the point of its explosion. But why didn't the waiting passengers in the hall hear it and panic? If it was too far, how McClane can arrive to Esperanza's aeroplane so quickly?