I was first exposed to this movie when it seemed to air on NBC every six months or so back in the early 80s, and as a result it's hindered my ability to enjoy it as a guilty pleasure on home video, even on widescreen DVD. That's because the TV showings were purposefully padded to two parts with more than an hour of extra footage that in this case places the characters in much better context than they appear in the theatrical version, (don't get me wrong, it doesn't elevate it to a topnotch story, but at least the narrative makes better sense). The biggest revelation upon seeing the theatrical cut was how all of George Kennedy's scenes before the crash weren't there any more.
Even at it's best, Airport 77 is only par for the course as far as disaster movies go. The plot is a little more innovative and the rescue scenes of trying to survive and then get the plane raised are more realistic than what we were served up in Airport 1975 with the stewardess flying the plane. Jack Lemmon does succeed as the nominal lead and that helps make one more charitable toward the rest of the supporting cast which is largely wasted in some classic, stereotyped cliched roles. But towards the end, it starts to drag just a bit. You can also see the beginnings of Jimmy Stewart's declining health since he's basically forced to play his part as though he were appearing as a guest on the Johnny Carson show instead of making his character more distinctive.
The widescreen DVD is worth having but I strongly recommend catching the expanded TV version instead, even if it is panned and scanned.
