@A33Zab
!But that is not the issue!
Thanks for elaborating on the dependencies.
Owain Glyndwr in
Thread No.8 - Page 47 -
.... one doesn't calculate AoA from CL but CL from AoA. CL doesn't figure directly in assessment of whether the aircraft is near stall or not - that is a simple function of AoA and Mach Number. If AoA is measured (as it is) then at low Mach that is enough to determine stall margin. When at higher Mach the boundary needs to be adjusted (which is why a simple AoA gauge cannot function as a stall warning when airspeed information is lost), but even then it would be possible to work with a default value which, even if it did not prevent "stall", would serve to avoid the sort of shambles that we see in AF447.
... described it similarly.
I've said it before, and I'll say it again - this PF never registered the Law change and its implications, neither in pitch or roll attitudes. Startled by the A/P disconnect and oblivious to anything else but dealing with the roll, he pulled back in the belief that AoA Prot would keep the aircraft in a stable longitudinal configuration. Revealing a deadly lack of knowledge in the FCS dependencies. Nothing changed over the next 4 minutes.