The answer is NO. ADIRU= AD+IRU
Actually 2 boxes in one. The IRU part works seperately from the ADR Part. U can switch off the ADR part , but when U switch off the IRU, the box is switched off.
I suppose it means that the ADR part of ADIRU needs the corresponding IRU but the corresponding IRU wouldn't need the ADR, which could prove my point that faulty ADR (airspeed) data would not generate IR related faults.
In the qantas flight maybe the IR1 problems led to erroneous ADR1 "conclusions", including AOA (please correct me if wrong).
Another question:
Could someone already "decipher" the TCAS fault... How does it relate to "doppler", if it really does ? Is it related to the "antenna" or to distance/speed calculation (then it would need at least ground speed, I suppose).
Editing: Someone already stated that in the AI docs the TCAS is indeed 34-43 and not "doppler"