VicMel
It is not just the 'IR2 fault' message that questions the 'blocked pitot theory'.
As I understand it, you cannot be certain there is an IR2 fault - IR2 is the first of the systems that is reporting the ADIRU2 (1FP2), HARD fault. All explained on page 48 of the English translation. So the fault may not be the IR but some other portion of the ADIRU. I stand to be corrected if the (1FP2) bit gives that information, as I don't have a clue what it means.