Originally Posted by
xcitation
There have been airbus cases where spurious rates of descent and false stall warnings were correctly ignored. However to your point I think it helpful to add a dedicated AoA guage to avoid any question of what is betty doing now. I believe this is an option on the bus.
Do these guages work in all situations (including during a stall)? One of the (I think) significant problems on the flight deck of AF447 was that the aural stall warning was inhibited when the airspeed became too low for the aircraft to reliably calculate AOA. This lead to the confusing situation whereby the stall warning would sound every time the crew started to take appropriate corrective action and the airspeed came back up into the range where AOA could be calculated. The rest is history.