When the police are chasing the plane up and down the runway, the sleeves of Jack's jacket change colour and material when the camera alternates between Jack's face and the control yoke.
The helicopter changed from a UH-1 Iroquois to a UH-1N Twin Huey.
All the interior shots in the plane, and the exterior shot when MacGyver is firing the gas cylinder out the door, show a rectangular doorway with rounded corners. When the plane lands, the doorway has become more oval shaped with rounded top and bottom.
The same white and blue bulbs are seen exploding twice.
When MacGyver fires the gas cylinder out of the plane's side door, at right angles to the runway, it travels quite a way through the air before somehow landing on the runway behind the plane.