The spelling of the last name of Henry Darrow's character has changed from "Esteban" in the episode "Ground Loop at Spanish Wells" to "Estaban" in this episode.
When Brackett and Esteban head out to practice parachuting the plane is heard starting while Brackett and Reach are talking, and Esteban is in the plane. Earlier it was established that the plane needed to be hand-propped to start it, but there was no one there to do it this time.