Originally Posted by CONF iture
Question for HazelNuts39, at which angle the AoA probes should freeze for Alpha Floor to activate before M.53 is reached ?
Originally Posted by CONF iture
I believe the value for alpha-floor can be variable somewhere between alpha-prot and alpha-max.
Agreed. But even without knowing the threshold value, it is unlikely that alpha-floor would be activated due to freezing of the alpha sensors below M.53 in a typical climb speed schedule. The green line in the following graph shows the AoA at significant points of the climb speed schedule for an A330 at 229 tons / 29% cg. That supports the remark in the PNC CONTACT article that blockage of the alpha sensors occurred fairly early in the climb, in the graph before the acceleration to 300 kt at FL100.
