Originally Posted by
Machinbird
I gather you didn't get to a high enough AOA to experience the invalid airspeed condition (or that the sim was not programed to duplicate that feature). One wonders how the little 'Bus would handle that.
The sim is not programmed to handle that (as I understand it's it's a little-understood phenomenon to start with), and even if it did we didn't have enough time to take it that far outside the envelope while I was there. My testing colleague ran them to a greater degree the week before and said that the sim outputs relayed valid speeds (despite the failed air data situation relayed to the PFDs and flight control logic) all the way down, or at least as far down as they went. Just to be clear, this test was simply intended to demonstrate that nothing was untoward with the systems, there was no unintended knock-on effect from Alternate Law affecting the controls and that even with full nose-up trim wound in it should be possible to effect a recovery with sidestick input alone *as long as the situation is recognised in a timely manner*.