Revealing mistake: While the plane is almost upside down, papers and stuff fall inside, but one can notice that it's the actors throwing the papers, not gravity making them fall.
Airport '77 (1977)
1 revealing mistake - chronological order
Directed by: Jerry Jameson
Starring: Jack Lemmon, Joseph Cotten, Olivia de Havilland, Lee Grant, Brenda Vaccaro
Continuity mistake: Jack Lemmon is picked out of the ocean by two men in a rubber boat. Both have dark hair and moustaches, one is balding. When they arrive back at the ship, both men have blond hair, are clean shaven, and are obviously younger. (01:24:10 - 01:24:55)
Karen Wallace: Excuse me, I don't mean to intrude, but could you move your ass, dear?
Trivia: The navy radioman who first receives the emergency signal sent by Captain Gallagher (Jack Lemmon) is played by Chris Lemmon, Jack Lemmon's son.