Originally Posted by
Alchad
I thought quite a few fairly authorative sources had conjectured that the forces on the stabiliser in the out of trim situation they found themselves in were such that it couldn't be counter-acted by the electric trim or the manual wheel?
Alchad
Correct on the difficulty of using
manual trim to alleviate a severe out of trim condition. However, there is nothing in the entire history of the 737 trim system since the introduction of the NG that indicates that the Manual Electric Trim would stall out under a heavy aerodynamic load (well, at least as long as it stays within the certified flight envelope). There have been other various issues over the years as one might expect from any aircraft system, however this is not one of them. If this were the case, it would already be out there by now.