The recurrence of control losses due to ADIRU faults and the lack of solutions from the manufacturer is a serious issue still valid today. If this is not the cause of this accident I'm still wondering how these aircrafts are still flying under such circumstances. The sequence of faults generated by ADIRU faults is a major risk of upset aircraft situations, especially at night, in turbulences and IMC. What are we doing about it?
Best post of the day.
If conditions (ice, CAT, whatever) overwhelm the ADIRU and upstream systems and cause a reversion to alternate law (and distract the cockpit with error messages) and remove the very protections (overspeed, stall) you really need in those conditions, isn't that a pretty bad situation to deal with?
There are going to be two big questions for the investigation to answer:
1) why did the crew get so close to a CB (wx radar etc)
2) why was the crew unable to prevent the a/c from entering an aerodynamic condition (overspeed?) where it broke apart