Originally Posted by OVERTALK
As Normal Law would've been in play when (and if) the A330 hit Mcrit, for these protections to have been then overcome (and an upset occur), what particular anomaly could've been involved at the same point or as an immediate preliminary (i.e. to cause a transitioning to a degraded law - and kill the protections)?
If all airspeed indicators under read at a similar level, the high speed protection won't trigger even if the real MMO is already passed. At this point the airplane is still in Normal Law as no malfunctions have been identified. The message for the Pitot tubes malfunction can appear only later on when finally the split between airspeeds reach the required threshold ... only then appear the ACARS messages as we know them ...
Very unlikely does not mean impossible ...