Question from an occasional spamcan (and armchair)flyer: is it possible that with the trim all back (without the crew immediately aware of it), one would need to pitch down and/or roll the trim wheel forward for a very long time to get the plane unstalled. For such a long time that after half the time actually needed a confused pilot could get the impression that he must already be in the first quarter of an outside loop and therefore ceases his efforts?
The trim would take some winding to move the stab, yes. It would definitely be necessary to unwind it to un-stall the aircraft, as +13 degrees of pitch trim is a very large amount, to the point that elevator effectiveness would be very questionable to even start pitching the nose over.
Again, a lot of what we are discussing comes back to basic airmanship. It would be clear from the ADI that the aircraft is stable in pitch and not looping. It would seem that they didn't doubt the validity of the ADIs at any time.
A question we will never get an answer to is why they ignored altitude data? It was the pitot probes that were blocked, not the static ports?