Ethiopian airliner down in Africa

[EDLB]

Originally Posted by Takwis

Lots more discussion of manual trim, here: https://www.satcom.guru/2019/04/stab...and-range.html

Thanks for the link. So Boeing added at least two more lined up holes in the cheese on the MAX. MCAS much more powerful with 2.5 degree steps. Removal of the Autopilot+MCAS trim cut out switch. You now go direct to manual wheel crank trim only, if you have to cut out the influence from any automation to the trim.
And as a third hole that manual trim wheel is jammed if MCAS did his job on false data from a single sensor.

How did they get this changes through certification?

We know now with 20/20 hindsight that you are in deep trouble if any of your flight automation systems goes rough and you have to cut out trim.

Unfortunately for Boeing I do not see the Max getting back in the air soon.