Given that, as we all know, MCAS was implicated in the Lion Air accident, it won't come as any surprise that the answers to many posters' questions about what MCAS is, how it's supposed to work and how its misbehaviour can be mitigated have been discussed (extensively) in
that thread.
Worth a read for those who haven't and need to ask the same things. Might save a bit of bandwidth in this one.
