Failure Modes
Yes, HC, your point re the 225 and the like is valid. The FBW aircraft of course, use the same approach except that the failure mode consequences increase the degree of electrical power, computing and sensor redundancy yet further.
For the case that started the discussion, and like equipped machines though, trainable failure modes do exist. That brings to mind something that has yet to be mentioned re this case: the pitch attitudes that are described in the reports are pretty extreme. I saw no mention of any command pitch attitude limits within the 155's AFCS/Autopilot software ( and I'd assume they are there, with numbers far less than the aircraft achieved ) or was the situation that those attitudes were achieved by the aircraft with the systems disabled?