When Airwolf blew the Bell UH-1 out of the sky the exploding wreckage was that of a Hughes MD500 which was also a different color.
One of the UH-1's was a single engine model, the other was a twin. It appears Airwolf first shot down the single and the twin was left flying. But then Robert Ito was flying the single before it was shot down.
The seconds ticking by on the Airwolf's timer do not tick by as fast as they should, and sometimes do not tick by at all.