Originally Posted by
ams6110
Because MCAS exists purely in software. There is no separate wiring or mechanism that is specifically "MCAS" it's just the electric stab trim.
Perhaps therein lies the solution. I wouldn’t trust a “software update” from Boeing to well and truly fix this. They need to redesign MCAS such that it becomes a discrete and isolation-able input. Until, of course, the 737 is redesigned from scratch altogether.