In reading the list of reviews posted here, it's clear that many who have reviewed this film, just plain don't get it. For starters, Airplane One is perhaps the greatest comedy every made. To put this movie down by comparing it to the original is like saying every new film that comes out stinks because it's not quite as good as Citizen Kane.
The second mistake people make is to point out the places where this movie continues jokes from Airplane 1. These items are re-used for one simple reason, BECAUSE THEY WERE HILARIOUS!!! One thing to remember is that in '80 & '82, VCRs and rental stores had not completely taken root in popular culture. When this movie came out in 1982, it's not like the fans of the first had been sitting around watching the video over and over again for a year leading up to it-- They had been sitting around for two years talking about the funniest movie they had ever seen. They continued the humor in the same way that Saturday Night Live did A LOT more than ONE episode of Hans and Franz, or Chris Farley's motivational speaker.
If you buy this movie, just watch it, and enjoy it; not for what it isn't, but what it is. Slapstick has never been done as well as in the two Airplane movies.
"Check it bleed, the bro was ON! Didn't trip, but the folks was freakin' man! Hey, and the pilots were laid to the bone, holmes! So blood hammered out and jammed jip, sheeeeet...Tighented that bad sucka 'side the runway like a mutha... Sheeeet (golly)."