Ah now my addled brain finally wakes up, well maybe. What may be happening here is the ADIRU is doing AoA based static port compensation. It will normally be a

Ah now my addled brain finally wakes up, well maybe. What may be happening here is the ADIRU is doing AoA based static port compensation. It will normally be a small correction, and I was trying to keep that out of the discussion because I thought there there have been reports of erratic airspeed in previous Lion Air flights and that was not jiving with small changes of airspeed I was expecting (and now I'm going to reread the Lion Air preliminary report to check what was reported). But to start with you only need 5 knots to trip the IAS disagree, so sure I'll expect it could trigger that (and also possibly an altitude disagree). But potentially more intersting is what does that usually small static compensation change do when the ADIRU thinks the AoA is really out of whack, does it keep applying the "correction" or does it ignore it? So that question circles back to be similar to what Greenspun is asking in the original article.