AF447
Some of the messages on PFR are insignificant with reference to Maint status items..plus those covered by ATA 22..Autopilot. Signficant data appears to be air data reference disagree, fligt control alternate law and rudder travel limiter fault. The latter if both 1 and 2 RTLs are at fault could allow full rudder input thus, subject to aircraft input, overstress the vertical stabiliser. ADR disagree could be as a result of assymetric severe icing conditions. As a result of flight control altn law fault I believe that flight envelope protection may have been compromised allowing inputs to exceed safe parameters levels. So possible causes would originate through the severe weather experienced but ultimately the loss of the aircraft may be contributed by the loss of the flight envelope protection. I will emphasise that this is pure speculation having read the ACARS PFR and without reading any previous threads.