Ethiopian airliner down in Africa

[737 Driver]

Originally Posted by GordonR_Cape

I can't find primary references stating that, other than the text and chart by LEOCh previously mentioned: https://www.pprune.org/rumours-news/618252-boeing-737-max-software-fixes-due-lion-air-crash-delayed.html#post10423226

The best simple description is a single sentence from b737.org.uk: 737 MAX - MCAS

The description cited above is not an official Boeing source. I have seen not any system description from Boeing that states that MCAS will ever input nose up trim. In this way, it is not unlike what the Speed Trim System does approaching a stall when the flaps are extended.