Revealing mistake: Near the end of the movie, when Maverick's plane is about to be launched, there is a quick closeup of an F14's nose gear, which is quite obviously not hooked up to a catapult or anything else.
Revealing mistake: In the last dogfight, we see four MIGs circling around Iceman, trying to get him down. A few moments after, Maverick gets to the scene, and the same shot is being used.
Revealing mistake: In every in-flight cockpit scene a brass hand wheel is visible on the right side of the headbox of the seat. The only time this hand-wheel is installed on the seat is to disconnect the seat from the aircraft and to disarm the seat. Therefore, the plane and actors in those scenes were on the ground with a moving camera because there is no way that an F-14 would be allowed to fly with "dry" seats.
Revealing mistake: Maverick and the others are supposedly on the Enterprise (CVN-65), which is a one-of-a-kind ship with a distinctive silhouette, but the movie repeatedly shows the Carl Vinson (CVN-70), a Nimitz-class carrier.
Revealing mistake: The aircraft the American pilots are fighting against at the end are described as being "MiGs", but they are American F-5 jets, called Tigers, which the Navy is still using for the training of young pilots.
Suggested correction: It could be argued that in the alternate reality of Top Gun the fictional "MiG-28" was an improved reverse-engineered F-5 (VPAF gave the Soviets access to ex-VNAF F-5:s for evaluation after the fall of Saigon) explaining their similarity.
This isn't a valid correction for a trivia entry. There is no mistake being suggested, just letting viewers with limited plane experience know MiG-28 isn't a real plane.
Bishop73