[quote+EMIT]
In general.
On the subject of pitot icing: yes, it can happen, on Airbus as well as Boeing.
TAT probe icing happens as well, probably more often than pitot icing. It can be observed from the TAT anomaly phenomenon (again, read the Boeing Bulletin). For crystal icing to occur, you do not have to fly through any solid wall of red, just the light green outskirts will suffice. [/quote]
1. If TAT probe ices up, how much impact would that have had on the pilot's observation during the crew brief (all three pilots) in re temperature not changing as forecast? How much impact would that have on the T value used by the ADC for various computations, and thus both displays and inputs to the Flight Control Computers?
2. If AoA vane/probe ices up, is there a warning associated with that which crops up on ECAM? I'd not expect an iced AoA probe to be noted in ACARS for maintenance, since AoA would most likely un ice as the aircraft descends. (Put another way, flying in and around ice isn't a maintenance fixable issue in re AoA performance in flight. )
If AoA is suffering from ice degradation, is that of any use in discussing this mishap? It appears that the AoA probe kept feeding FDR data all the way down. Is there any reason not to assume the AoA dat reliable?