Procedures
I have read the following in the A330-340 Flight Crew Training manual (perhaps not the latest version?)
"Triple IRS or ADR failure is very unlikely and is not displayed on the ECAM. Should a triple failure occur, two double failures would be displayed, i.e. ADR 1 + 2 FAULT and ADR 2 + 3 FAULT. The subsequent ECAM actions would give conflicting instructions. In this case, apply the QRH procedure for ADR 1 + 2 + 3 failure. This is one of the few cases where the crew will not follow the ECAM procedure."
So the crew is left with conflicting info and have to find the proper document BEFORE they act.
When it comes to the software and hardware used on AF447, the BEA reports are very silent. Why give details about engines and some other hardware, but noting about the FBW-system? E.g. the QF72 accident report made by Australians contain a lot of such inf.
Now I am awaiting the flogging.