gentlemen, with ref. the QF72 event and the ADIRU induced decent, and having experienced a similar fault in 738 and witnessed a AP induced roll as a result that was explained to me to be the fo's ADIRU going into test mode! Is it possible for a pitot blockage on AF447 to induce a similar fault at the commencement of the event.? Could it induce a failure to both ADIRU that may have presented to the pilots a extremely violent maneuver.?