The pilots knew about MCAS. What the texts indicate is the behaviour of MCAS was changed during testing without the pilots being informed, and the pilots also f

The pilots knew about MCAS. What the texts indicate is the behaviour of MCAS was changed during testing without the pilots being informed, and the pilots also failing to report that change despite becoming aware of it. This was certainly a contributing factor to the events that occurred later, but not at all the smoking gun that the title implies. Forkner: "Oh shocker alerT! MCAS is now active down to M .2 [mach 0.2] It's running rampant in the sim on me at least that's what Vince thinks is happening"