Originally Posted by
Takwis
OMG, this is hilarious! So if STS is "commanded trim", and if the MCAS is merely software driving the trim through the STS system, then that means (drum-roll, please)... MCAS is "commanded trim"! Therefore the checklist does not apply!
STS is an expected trim action that one learns about and experiences with the procedures trainer, simulator and his or her first line trip. Moreover, STS works to bring the aircraft into trim, not out of trim. There are no surprises here.
Having the trim system pitch the nose down with 10 seconds of trim with MCAS or any other reason where trimming action is not expected is “uncommanded trim” and is a surprise. A big surprise.
Have you been able to find the reference stating that a stab trim runaway has to go to the stops yet? I am anxious to see this.