Originally Posted by
bsieker
Not all opposing electric trim is stopped. Only main electric (control wheel switch) and autopilot trim. STS is not the autopilot.
[...]
And if you insist that something "broke" the column cutout switch design philosophy, STS did it first. It also trims against stick deflection, explicitly to "increase control column forces".
Bernd
Sorry, with the greatest respect, I think you are mistaken.
STS is
not the autopilot, and it only operates with autopilot off,
but it operates
using the autopilot trim signal. It is therefore cutout by (a) the "autopilot" console cutout switch on NG, and (b) the column cutout switch (if in opposing direction). I have multiple references all clearly stating this and functional diagrams showing it, but I'll quote just one, from the NG AMM 27-41-00:
The column cutout switches stop the stabilizer trim actuator when the pilot moves the control column in a direction opposite to the trim direction.
Stop the actuator, for opposing trim, period, regardless of signal source.
But not on the MAX - the cutout is bypassed when MCAS enabled (and that new bypass wouldn't be needed if STS already bypassed it).