Originally Posted by
MurphyWasRight
It is important to remember that the AoA miscompare alert was not an option.
It is a standard feature that Boeing knew was not working unless the optional AoA display was installed.
Boeing knew this for a significant amount of time -before- the Lion Air accident.
Had it been working on the penultimate Lion Air flight it might have led to fixing AoA sensor system before the accident flight.
Bravo, Murphy, thank you for clearing that up. I had misrepresented how that all fit together.(And honestly, I think I misunderstood that it was only optional in terms of "see it or don't" based on a months ago discussion on "what does one put on the already scarce real estate of pilot displays" ....) Appreciate the course correction.