deSitter: it has nothing to do with Airbus!!! IF the pilots don' t respond to a GPWS worning then it flies in the mountain; would it be A or B or else!
IF the GPWS is inop then be even more cautious to high ground! A or B ...
And FMC ( called FMGC in Airbus ) has nothing to do with TOGA pwr. If you put the throttles full fwd they are in the TOGA detent and TOGA pwr is applied. It works.
FBW390