Visible crew/equipment: At the point where Striker is walking through the tunnel to board the plane near the beginning, for a split second, one can see a section of cable lying on the floor.
Airplane (1980) - 4 with pictures
Directed by Jim Abrahams, starring Julie Hagerty, Leslie Nielsen, Lloyd Bridges, Peter Graves, Robert Hays, Robert Stack
Screenshots of mistakes are only visible to members, but there's a free picture of the day, updated daily, and the top 30 screenshots are accessible too.
Other: During the disco scene, Elaine is dancing with a fisherman who was just stabbed in the back. The fisherman has a knife sticking out of his back and you can clearly see the block that the knife is stuck in protruding from his shirt. There are holes from other takes too.
Revealing: In the dance sequence, we see Elaine twirling Ted around and throwing him into the crowd. Watch the top-right-corner of your screen, as the stunt-double lands in the audience you can see Robert Hays (Ted Striker) in the top-right-corner waiting to pop out.
Visible crew/equipment: In the Disco Dance scene when Elaine is twirling Ted, you see a wire holding him up.