Factual error: Probably an in joke - the wheels of the "airliner" shown landing at LA international airport are those of a B52 bomber. They are very distinctive and look nothing like those on any airliner ever made.
Edith's Final Respects - S9-E5
Continuity mistake: In this episode Jean Stapleton plays two characters. As Edith Bunker her earrings change from gold that curve below her lobes to white round ones later in the show.