WNC, Something must have distracted them from deviating. If they had been monitoring their radars and they were working properly they would have deviated. It is unlikely all the failures started before the turbulence of penetrating the cells because it is unlikely all the bad luck came at once. More than likely the turbulence caused the failures because of icing and power interuptions. Now that they have found some wreckage and passengers so maybe they can find the black boxes. I think Air France is hoping they are never found.