Flight Detent, I was thinking somewhere along those lines too. In the movie, the terrorist at the controls purposefully put it into a dive just as the passengers were trying to crash into the cockpit.
This is all speculation, of course. The film-makers had to resort to much "creative licence" to say the least. I'm not even sure if the CVR/blackbox was ever recovered.
I was depressed throughout the entire film - although the film makers tried to deal with the subject in a sensitive manner.
The final fade-out was quite profound.
Thanks for your reply.