Early in the movie when Chuck Norris is inside the F117, he appears to be sitting where the engines should be. The only way the area where he is shown riding could exist would be if the aircraft had no engines.
When Chuck Norris drops out of the F117's bomb bay, his body appears to be about the size of one of the side windows of the canopy, which means either he is about 3 feet tall, or the stealth fighter is far bigger than its actual size.
When Chuck Norris jumps from the building with the President's wife, he flies over the ocean and drops her. After that he is seen flying away at a much higher altitude. He has no means of propulsion, just a parachute.