Originally Posted by
Mazster
Part of my puzzlement remains, why did the crew on the previous flight know how to do a cut off on the MCAS and this crew didn't.
They didn’t cut off the MCAS, they prevented the MCAS from operating the trim. It sounds like the first captain just happened to notice the trim driving nose down and turned it off. Perhaps there weren’t as many bells and whistles going off. If they knew what the MCAS was and how to cut it off they were amongst a very small minority.