During the final battle with Stoller, Jake and his Apache are directly behind Stoller's Scorpion. However, the impacts from the Hydra rockets are squarely on the side of the Scorpion if it were perpendicular to the Apache.
When Jake and crew are driving around the base in the humvee, the strap on Jake's head moves from over his left eye to covering it completely.
An OH-58D (The helicopter flown by Sean Young's character) can not be flown single-pilot in the left seat. Many of the Mission-Related controls are only available to the Right-hand seat (Pilot-in-command seat.)
The sequence in which Billie shoots the jet fighter hunting her and Little, using a Stinger, makes no sense. Jet fighters would not waste effort to go after the crew of an already downed helicopter. Their job is to eliminate aerial threats, which the crashed Apache no longer fits for. Not to mention that they are very poorly suited for manhunt.
When Chief Little arrives in Fort Mitchell a superior officer salutes him first. Lower ranked officers always salute superior officers first with the the salute returned.
During final combat scenes when Warlock is trying to shoot the jet, his display shows as if he was using an Air To Air missile (Stinger) with a locking system. As soon as he gets the lock he shoots but the following scene shows many unguided rockets (Hydras) firing from the Apache. So not only they are unguided, means no lock available, but also they are not used to shoot at aircraft but ground targets only.
The instructor Pilot sits inside the simulator box with the student, and inputs simulator training data from inside the simulator box , not from the computer room. The Pilot and Gunner are in separate simulator boxes, not in the same box. The computers for the flight simulators use disk drives. Tape drives would be to slow.
When Jake is driving the humvee with panties around his head, the material is covering both his eyes. Not that it matters. He would be able to see through the material. An eye patch over his left eye would have done a MUCH better job.
Military helicopter pilots do not refer to their aircraft as 'airplanes'; 'aircraft' or by its type; perhaps 'chppers', 'copter' even in a less affectionate way, 'eggbeater' but not airplanes.