The Zucker/Abrahams directing trio ('Jerry Zucker' , David Zucker & Jim Abrahams) claim (on the audio commentary on the DVD release of Airplane! (1980)) never to have seen this film. They initially agreed to a sequel and then baulked at the idea at a later date. The movie went ahead without their permission and despite their protests - thus, they refused to watch a single frame of it upon its release - and still haven't over 20 years later.
The sound effects as the boy in the control room is "playing" with the incoming plane's radar are from the Atari 2600 game Yars' Revenge (1981) (VG).
Writer/director Ken Finkleman provides the voice of ROK 9000, uncredited.
When movies are made, scenes are often
left on the cutting room floor.
Sometimes, there will be several versions
of a movie floating about on cable, tv or video etc. Other times, a Director may
release a special cut of the movie.