@CONF iture:
Alpha floor is activated:
if filtered AoA(3s) > threshold; which depends on CONFIG, GS variation and difference between GS and Vc.
or
SS NU >14° and theta > 25°
or
SS NU >14° and AoAprot.
Alpha floor is inhibited > M 0.53 or by FMGEC @ certain engine failures.
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but that's what the book says, in your opinion it could be anywhere...