Originally Posted by
bsieker
I'm not that closely familiar with 737MAX systems, but how can the trim still run away if the switches have been set to "CUTOUT"? Aren't they mechanical circuit breakers?
There could be other defects. Like a short circuit/loose wire which accidentally powers the electric trim motor. Or an incorrectly installed wiring. One never knows what could happen. That's why, when everything else fails, you can still grab and hold the trim wheels as a last resort.