@
OK465
It would seem that the major differences in ALT Laws are:-
ALT1:
Pitch attitude (
Θ) protection lost.
Hi Speed and Stall speed are alternate.
ALT1A:
As ALT1 but Stall protection is lost.
ALT2:
As ALT1 but lateral normal law is lost and replaced by
lateral alternate (Roll = DIRECT; Yaw = Alternate)
ALT2A:
As ALT2 (Stall protection is lost)
ALT2B:
Pitch attitude (
Θ) protection lost.
Hi Speed and Stall protection lost.
Bank angle protection lost
Source -
A33Zab in
AF447 Thread No.6, and in
ALT2B no Hi and Lo speed stability (= VMO2/ Vc prot),
as explained
earlier in this thread.