PJ2
Thanks for helping
. I've been using the same Airbus derived reference. I see that my recollection was wrong about Load factor protection in Direct Law. (It is lost).
I haven't re-located my reference regarding the airspeed as the source for alpha protection in Alternate law-but look at this footnote in your diagram!
(1) Protection is totally lost, in case of VS1g computation failure (loss of weight, or slat/flap position).
If you had actual angle of attack sensor derived protection in Alternate Law (1) or (2)-
Why would you lose it with loss of the VS1g computation? I guess I'm on the hook to come up with the reference.
Machinbird