Originally Posted by
ST Dog
But they do. MCAS is neither main electric trim nor autopilot trim.
My understanding is that STS is not included either.
MCAS is an extension of STS and STS runs through the autopilot trim.
There is an STS system which includes speed trim functions and MCAS functions,
STS function will be cutout via the control column cutout switch. By design MCAS will not. The only reference to bypassing the column cutout is using the stab trim override switch.
However, the AOMs and FCOMs don’t explain the exception for MCAS, obviously.