When Dom brings Airwolf to pick up Hawke for the duel with Stappleford, Hawke had already landed the biplane and was helping Roan save her plane. However, the wide shot as Airwolf approaches to land, shows the propeller on the biplane was still spinning down.
When Hawke brawls with Stappleford's goons, Jan -Michael Vincent's stuntman is seen in several of the shots.
When Hawk commandeers the biplane to rescue Roan, the stunt pilot is seen in wide angle shots of the plane in-flight and during the landing.
When Roan is forced to land her racing plane, she is wearing a flight suit and helmet and is covered in engine oil. When Hawke and Dom return from their air duel with Stappleford, Roan mentions she tried but couldn't save her plane from the fire. She is standing by the burnt hulk of her plane holding a fire extinguisher and dressed up in her billowing black pantsuit with perfect hair and makeup.
When Miss Carver's P-51 is burning, the writing on the side is reversed.
The 'cockpit computer tapes' that Miss Carver stole are just pieces of paper.