Originally Posted by
gatorbird
605 and beyond. It's called "AOA mode" and is just that, a red/green/red fast/slow indicator and GPS altitude. Could save your ass with unreliable airspeed; easiest way to get there is turn all three ADR PBs off.
Of course, this mode won't do much for you with frozen AOA vanes...
That's it. Unfortunately, its not discussed that much. It should be with all these OEBs referring to unreliable airspeed and blocked AOAs. In fact our AOM Vol. 1 is so old I don't believe its in there.