Originally Posted by A33Zab
Agree the BUSS is not compensated for Mach (as it is not compensated for speedbrake) but that is not the reason for the FL250 threshold.
Agreed that is not the reason stated by Airbus. However, if the BUSS had been intended to be usable above FL250 a lower value of the backup stall warning threshold would have been appropriate.
Last edited by HazelNuts39; 18th Jun 2013 at 10:14.