Originally Posted by
patplan
...In simulator tests, government pilots discovered that a microprocessor failure could push the nose of the plane toward the ground.
I'm guessing that, as patplan suggested above, the problem is not an actual (processor) hardware failure. More likely, it's a failure to see or process inbound data, which could be caused by _________ <<< insert favorite cause here.
Whatever it may be, this is another "not reassuring" development, if the reports are accurate.