Originally Posted by
BDAttitude
I have no idea how fault discrimination usually happens in the maintenance systems of airborne heavy iron, but logging several consecutive faults like IAS-Disagree, Altitude Disagree and AOA Disagree in case of one single defective sensor does not seem to be very clever at least from the perspective of someone who works on such systems of non-airborne heavy iron.
This is one of the latent issues in the NG and MAX. To ensure a common type rating with the classic, they had to have the same antiquated master caution and annunciation system that the original debuted with. EICAS was discussed at the time of the NG but dismissed as an option.
This means all NNCs tend to require more careful confirmation and use of checklist condition statement than the 80s vintage EICAS or ECAM.