Originally Posted by
HazelNuts39
However, IMHO when stall warning is active it should not stop when the AoA becomes invalid but should continue to sound until a valid AoA signal indicates an AoA value less than the stall warning threshold value.
I'm sure that is the idea that will underpin the eventual logic change requested by the BEA. However, as a logic guy I feel compelled to point out why it isn't necessarily that simple. Changing any logic path will have various side-effects that were not previously considered, and factors that will need to be taken into account include the mean-time-to-failure of the components, including the AoA vanes themselves (because theoretically you could have a mechanically-failed AoA vane causing a false stall warning to remain sounding even if the remaining pair are experiencing only a transitory failure). Ultimately it's a question of probabilities and statistcs that I freely admit is a weak point in my mathematical understanding.