Originally Posted by
DingerX
Or, for the previous flight, the red lines mark where the cutout comes in. In both cases, the last automatic call for ND trim occurs without corresponding trim movement. The second time, they try to give it a bit of NU trim, only to be countermanded. Cutout again, and the trim moves NU without electrics.
This is what I think too, note also that the repeated ND automatic trim starts coincident with flaps 0 (as it does on the accident flight, so MCAS) - before that the automatic is sometimes up sometimes down.
Also in the descent there is plenty of trim movement with no auto or manual (electric) signals - my guess is cutouts and manual trim using trim wheel, until after landing.
The weird thing is that the auto trim signal is pretty darn quiet through cruise and descent, suggesting that the data is acquired downstream from the cutouts,
but there
are two brief sets of down-trim spikes during descent. Seems odd to move the cutouts then, maybe bad data?