Originally Posted by
bsieker
In hindsight that is probably a shortcoming of the risk and hazard assessment of the ADIRUs of the A330, yes. But the rationale for regarding all air data invalid at indicated air speed below 60 knots is that it was simply not known how the aircraft would behave in that regime.
I think you are either missing the point or perhaps I do not fully understand what you mean. 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. I think the only sensible rationale was to reject an indicated airspeed of 60kts for an airliner in cruise many tens of thousands of feet above the ground.
Golf - Sierra