While Airwolf's crew are closing in on the bad guys, Dom's monitor claims the enemy helicopter as a 'BX-16 Gunship' when it actually is a Sikorsky S-76 painted slightly differently to the 'HX-1' from a previous episode. Note the 'HX-1' logo has been removed and the guns are painted silver, also during the fight scenes when the guns are firing they are depicted as black, obviously the previous footage was used from the episode 'HX-1'.
As Archangel says the line, "We found audio surveillance in five rooms", a boom mic shadow is visible on the wall above his head, and the crew is reflected in the glass on the wall behind him.