Originally Posted by
wiedehopf
It was previously written in this thread that the AOA DISAGREE alert only exists when the PFDs are fitted with an AOA display.
I've read large parts of the thread, but not all of it. In our NG fleet we do have an AOA DISAGREE alert, but no AOA display (except implicitly via the flight path vector).
And since a faulty AOA can mess up flight data such that an experienced crew can get overwhelmed to the extent of crashing their aircraft, I wonder why Boeing offers the AOA DISAGREE alert as a customer option in the first place. That makes as much sense to me as offering optional engine fire warning loops...