DJ77
I think UAS was tracked well before 447 went in.
In the perhaps futile effort to get anyone to entertain other than "ICED PITOTS" I suggest that Unreliable airspeed does not mean "Reliable ICE"
It means that a system has become unreliable, and is being subtracted from a reliable scan, imho.
I submit that losing an engine should be orders of magnitude more dangerous than loss of a/s reads. Yet this failure has everyone's jock in a knot, and scattering to the books.
Steady. If Pitots have discrepant reads, or only one, and thus two of three samples are duff, what DJ77 intimates here is more interesting than Ice, and I submit, more likely.
It may be a wind tunnel snafu, a lack of extensive failure analysis, or simply the Bus' personality in "Severe Turbulences".
If she was behaving badly enough to elicit recovery inputs from our PF, and showed a tendency to roll ("Twitchy Ailerons"), plus an a/p trim that is thus far unknown, well, what is this obsession with ICE?
For all we know, she lost a radome into the F/O's Pitot. If one spends enough time with Vasquez' product, ICE is unlikely.