augustusjeremy:
If the AOA includes speed data, and if speed data includes inertial data - which I believe is correct - then an IR1 fault would indeed explain their problems with the AOA.
My understanding is that ADR is not in charge of AOA calculation, because when ADRs are off, you still have an AOA displayed. If ADR is not doing the math, only the IR is left to do it as all the air data stream is directed to ADIRUs.
Or I'm wrong somewhere.
The ADRs provide a number of outputs to many systems and a blockage of the pitot and/or static systems may also lead to the following:
· SPD LIM flag on PFD
· Alpha floor activation (because AOA outputs from the sensors are
corrected by speed inputs)
· Wind shear warning (due to Mach input)
· Flap load-relief activation
· Flap auto-retraction from 1+F to 1
· Alpha lock on slats retraction (due to the speed logic part of the alpha lock function)
· ALTI DISCREPANCY on ECAM
· RUD TRV LIM FAULT ON on ECAM