Continuity mistake: In the scene where Maverick and Slider are studying and Charlie slips Maverick the piece of paper with her address on it, Slider changes seats. First he is at one end of the table near the wall, then at the end of the scene he, and all of his stuff, is at the opposite end of the table. (00:40:30)
Continuity mistake: Count the doors opening and closing - Mav walks through a closed elevator door.
Continuity mistake: At the beginning of the film, the squadron commander enters CATTC with a chest full of ribbons, next shot, all ribbons are gone. There is no smoking in CATTC (for the equipment) and the radar in CATTC cannot be used to monitor air combat movement as they did in the film. The Combat Centre or CIC is used for that.
Continuity mistake: When the F14 lands in the opening scene, it is number 205. When it comes to a full stop, the number has changed to 114. (00:03:30)
Continuity mistake: In the volleyball scene, Tom Cruise is shown oiled up, tanned, and with clear muscle definition. He then walks off the volleyball court in a new camera angle. He now does not have the muscle definition or neck area tan he had during the volleyball game seconds earlier. Additionally, the configuration and number of people in the stands is different from the previous camera angle.
Continuity mistake: Mav flies aircraft number 114 throughout the movie, then loses it in the flat spin. However when he is flying with Sundowner where he won't engage them in the final battle he is back in 114 again.
Continuity mistake: While in the opening air scene, the names of the pilot and his RIO are backwards.
Continuity mistake: In the elevator scene Kelly McGillis's hair is a different colour (I think a shade of red) than earlier or later in the film. Apparently this scene was filmed months after Top Gun filming was complete while McGillis was shooting another film. This explains the baseball cap and ponytail.
Continuity mistake: In the scene where Charlie picked up Maverick from the hospital, you can see the rear view mirror of her car is low, between the actors' faces. The camera zooms in and the mirror can be seen raised slightly above the top of the windshield. The camera zooms out and the mirror is low again.
Continuity mistake: In the beginning scene of the movie, Maverick and Cougar encounter 2 Soviet Migs. When one of the MIgs is first shown from the camera angle on its right side, it is a delta winged aircraft. The next scene that shows the Migs, they have standard wings. The wings change at least twice during the opening air encounter.