Originally Posted by
Speed of Sound
As far as the trim wheel issue is concerned, this will probably need to be resolved by added redundancy in any ‘powered trim’ system. Retrofitting larger diameter trim wheels or placing a minimum strength requirement on flight crew are both non-starters.
I suspect you are right, though note that this solution will need to be applied to the NG also, and that all the checklists that require use of the trim wheel will need to be rewritten and training provided.