Originally Posted by
Golf-Sierra
In real life reality an A330 could not be at or below 60 knots kias other than either with the wheels on the ground or during some quite spectacular upset - and even then it would last for maybe a few seconds.
Golf - Sierra
Well, that assumption turned out to be false for the A330. It was in this spectacular upset, with indicated airspeed < 60 kts,
for almost 3 minutes with only short interruptions. During almost the entire time (again, with only brief interruptions), computed airspeed values alternate between 400, 45, 0, 45, 400, etc. where both 0 and 400 are recording artifacts, and the 45 possibly more or less accurate. During periods where the values were valid again, computed airspeed rose to 150, 120 and 100 knots, respectively, before returning to the invalid values.
Bernd