Graydon's attack helicopter has a red cap over the muzzle of its machine gun, but in aerial combat footage, the black cap is missing.
When Santini's tail rotor was sabotaged, counter rotation would put the helicopter in a continuous spin opposite the direction of main rotor rotation, but the helicopter was shifting in both directions back and forth.
After Santini landed the helicopter Hawke takes the Jeep to rush over. When he enters it all is mirrored: steering wheel is on the right side where he enters. The plates are mirrored, so is the writing "Santini Air". In the next shot when he arrives he leaves the Jeep on the left side and all is right again.
When Barron's Lear Jet is experiencing malfunctions a close up of the instrument panel shows a Cylinder Head Temperature gauge. Cylinder head temperature gauges are only on piston engine aircraft.
The paint scheme on the fragments of a helicopter that Mr. Hawke shoots down does not match the all black paint scheme of the helicopter that was shot down, indicating stock footage.
After Airwolf shoots down the first two helicopters, Graydon's helicopter is the only one left. It fires at Barron and Brewster showing two trails of bullets hitting the dirt. That requires two guns yet the helicopter only has one gun on it that can shoot bullets. The other weapon on it is a rocket launcher. The shot of the helicopter firing at them also shows the rocket launcher firing bullets which it cannot do.
After Graydon's helicopter fires at Airwolf while it is hovering, Airwolf immediately returns fire shooting down Graydon's helicopter as it is flying forward though it had no time to get up to speed that quickly.