Captain John Chang and Thomas Chang from Airframe are father and son pilots. John Chang, the father, and his son, Thomas were both piloting the N22, when John stepped out of the cabin for a cup of coffee. He left the piloting to his son. When a warning light came on, Thomas didn't have the experience to handle it and it caused the problems with the slats. Casey discovers this when she learns that the co-pilot had died in a Canadian hopital and that he was really John Chang. When she goes back and reviews the video, she sees that it is Thomas and not John who was actually piloting when the crash occurred.