Given that the recurring problem vis a vis Unreliable a/s is a suspect in AF447, how is the pitot problem continuing to carry weight? Each occurrence of anomalous readings means frozen pitots? I suggest there is more to the story besides rampant heated pitot failure?? Other types don't present the same Pitot issues. Pitot/airframe mis-match?? Power supply issues? It is getting mathematically difficult to sustain the three frozen pitot postulate.
There was an AD late last year that addressed Prim reset after engine failure test in sim. At failure, a/c pitched to zero, disallowing pilot input, a separate power supply was installed on separate bus bar, as the a/c was not pitch responsive while computer reset?
Will