Can anyone clarify for me the operation of the AoA system? The real angle of attack must be obtained from a lookup table that translates the vane position into actual alpha. How far does the lookup table go? The interim report says that (my translation) "The angle of attack, when it is valid [or reliable], remains above 35 degrees." (Emphasis mine.) What limits the validity of the reading? Is the AoA recorded by the FDR and reported by the BEA valid/reliable for purposes of visualizing the attitude and flight path of the airplane?