A great example is when Sam Coleman, a reporter who's standing at the airport, ostensibly with a gaggle of airplanes who are in a low fuel emergency circling the vortac in a holding pattern because terrorists have disabled the instrument landing system and taken over the communications system, says "I can see airplanes circling above me." Really? Do you suppose that, perhaps, the pilots can see the airport?
When Colonel Stuart wants to punish the Airport Manager, he adjusts the instrument landing system by turning a dial and using a light pen and "lowers sea level to minus 200 feet" so an airliner, whose tanks are "as dry as a martini" and which is "running on fumes" will fly into the concrete. Never mind that the ILS system does not work this way (altitude information is gotten from the - ready now - altimeter) and the descent rate of an airliner at 200 feet, what does this airplane, whose fuel tanks are supposedly as dry as a popcorn fart, do when it crashes into the runway? It erupts into a massive oily orange and black fireball, that's what it does.
I won't bother to wonder why the aircraft don't talk to approach control or ARTCC and, oh, go to an alternate airport. And, while we're at it, the Mythbusters in Episode 88 demolished the idea of lighting a trail of leaking kerosene (jet fuel) and having it catch up to an airliner to blow it up as happens in the climactic scene in Die Hard 2. Then there are the little things.
But: below is a screenshot from Die Hard 2 where General Esperanza and Colonel Stuart are in their "getaway plane," a Boeing 747 of late 1980's (pre glass cockpit) era. Above it is a photo of an actual 747 cockpit of that vintage. Are you kidding me?
The one-time suspension of disbelief is used on McLane's circumstances. There are probably dozens of small errors, seemingly no five minute period could elapse without one. Just like newspapers, every time, without exception, some subject is covered in which I have either specialist or personal knowledge, there are factual errors.