This definitely feels like a book that is going to throw a lot at you. In the first few pages there is turbulence, a man dying of a heart attack (maybe), and the pilot locking the copilot out of the cockpit. I mean, goodness graciousness, beyond the place crashing what else could possibly go wrong on this flight? As long as the author can manage all of these things without impressing as being overwhelmed in the writing, I think this could be really good.