Character mistake: When airport control makes the call to "change the boards" to delayed, Auckland (New Zealand) is spelled Aukland.
Die Hard 2 (1990)
1 character mistake - chronological order
Directed by: Renny Harlin
Starring: Bruce Willis, William Sadler, Bonnie Bedelia, John Amos
Factual error: It is impossible for a stream of burning jet fuel to follow a plane through snow and catch up. Not only is jet fuel extremely hard to ignite, almost as soon as the plane was off the ground the fuel stream would be too dispersed for the flame to climb up into the tank, and even if not it wouldn't burn fast enough to catch the plane.
Gen. Esperanza: Freedom.
[John McClane appears and punches him in the face.]
John McClane: Not yet.
Trivia: Producers of the movie were concerned that actual terrorists could use the information in the film to disrupt airport/airplane communications in real life. Most of the "sensitive" information in the film is not only wrong, it is purposely misleading to prevent terrorists from attempting what we see in the movie.
More questions & answers from Die Hard 2
Answer: In the first movie he's a New York cop visiting his wife. In the second Die Hard, he tells the airport officer that he's LAPD and moved there because of his wife's job. In the third Die Hard film, he most likely went back to New York because of marital problems and became a New York cop again.