Continuity mistake: When the car crashes into the tower, you can clearly see when it goes through that the car is not attached to anything, the rope that was pulling the car has gone, yet when the car lands on the ground you can see the rope still attached to the car. (01:28:30)
Plot hole: All pilots have the technology to secretly transmit a code that tells air traffic control there is a hijacking in progress, without having to say a word. They also have a hijack code, something that sounds completely innocuous to you are me, but would be instantly recognisable to the airport authorities.
Continuity mistake: When Pinball is looking for the three convicts who are to get off at Carson City, Cyrus and Billy Bedlam are standing near the front of the plane. Cyrus says, "The pilot's white," which prompts a laugh from Billy Bedlam. When Billy smiles his teeth are perfectly white - in the rest of the movie they are yellow and stained. (00:32:10)
Continuity mistake: Still before the hijacking, Pinball is talking to his left neighbor, sitting in the same row. In one shot, from the left, they both sit next to each other, in the same row. In a shot thereafter, Pinball has his head turned left and is talking to his "neighbor", but there is nobody. The guy sits in the row behind. (00:18:40)
Plot hole: When Larkin runs towards the crane to use it to stop/damage the business jet, he totally outruns it. In the beginning shot he is right next to it (alongside), and as the plane accelerates he starts running, he makes it to the crane, then in one shot from the front you can see how close the plane is already to the crane, and in the shot from the side you can see that it's farther away again but much faster, with Larking already sitting in the crane. Cindino is in a rush, they taxi/accelerate as fast as they can. It's impossible to outrun it, climb into the crane, and start operating it in a desired manner. (01:18:50)
Continuity mistake: When the plane is at Carson City for exchange of prisoners, the guards have jackets with 'Dept of Prisons' printed on the back, but there is a bus with 'Bureau of Prisons' written on the side. (00:35:50)
Factual error: After the hijacked plane departs Carson City, they are pressed for time. We can assume they fly a direct route to Lerner Airfield, not flying any doglegs. So flying over Fresno can not have been a deviation, it must be on a direct route from Carson City. Lerner Airfield, however, is exremely dry, wide-spread desert land, but such type of land doesn't exist in the lush areas of California South of Fresno, on a straight line extended from Carson City beyond Fresno. (00:43:40 - 01:04:35)
Continuity mistake: When Sandino is getting ready to leave the others behind, Larkin opens the tarp to the garage and is blown backwards by the engines. He then runs from the garage, the plane then comes from the garage nose first facing Larkin after it's engines were just facing Larkin. How could it turn around in that small of space? (01:18:20)
Continuity mistake: When Larkin is in the tower, the C-123 heads straight to the tower. When the shot cuts away, the plane flies right over it. In the next shot, from the side, the plane flies past the tower next to it. And in the next shot it's even banked in a curve, again next to the tower, although the camera is on the tower. (01:05:50)
Continuity mistake: During the battle at Lerner field, Poe drives a burning police car from the boneyard and leaves it right at the ramp at the rear of the plane, and then ties the plane up to the post. When the plane goes to take off and Cyrus sees the plane is tied up, the burning police car is nowhere to be seen.
Revealing mistake: When Pinballs is squeezed in between the landing-gear door and the fuselage/landing-gear, you can see in the face that it's a dummy. (00:53:35)
Factual error: The tour plane departs Carson City, but shortly later Larkin says that the hijacked plane was over Arizona (still believing it to be the hijacked C-123, not knowing yet that the tour plane has the transponder of the C-123 on board). Even if we take the NorthWestern-most area of Arizona, that would be over 300 statute miles from Carson City. That small plane can not fly over 300 miles in that short time. (00:59:25)
Plot hole: In one shot before the almost-collision between the C-123 and the Cessna, you see both of the planes on/above a runway. In the next shot, just before the almost-collision, you see the C-123 from behind, with the Cessna in front of it, but this shot is not on that runway anymore, it looks like a taxiway, and there is some airport building in close proximity at the end of it. Nobody would intend to land there (this is before the evasive maneuvre of both). (01:06:05)
Factual error: The tour plane flies way too fast and way too close to the buttes on its scenic tour. For one thing, that prop plane type cannot fly that fast, and secondly, no tour pilot would ever fly that fast and close to the surrounding terrain. Such a tour would most definitely be operating according to Part 135 of the Federal Aviation Regulations, but even if operating under Part 91 (which a commerial tour cannot be) it would violate the FARs in terms of minimum safe altitudes, minimum lateral distance from obstacles/terrain, and the catch-all "reckless and careless" clause would apply as well. (Notice this happens already before they're confronted with the Cobras.) (01:02:20)
Continuity mistake: In the final chase scene at the end of the film where Poe and Grissom are fighting on the ladder of the fire truck, and Poe handcuffs Cyrus to the ladder rail, Poe activates the ladder causing it to raise....this is not possible. The transmission of fire apparatus do not permit aerial ladders to be operational while the vehicle is moving. (01:43:20)
Continuity mistake: Colm's car gets hooked up to the plane and then, after crashing into the watchtower, falls to the ground. If you watch the shots of the car falling you can see John Cusack's arms go from folded to at his side multiple times. You never see him move them, they just appear to have changed positions. (01:28:35)