''About four minutes into the flight, the pilots gave up on the manual stabilizer wheel and switched the electric power to the tail back on, then used the thumb switches on the control column to pitch the nose back up.
But just five seconds later, MCAS kicked in again and once more pushed the nose sharply down.
Just 35 seconds later, six minutes after take-off, the plane rolled over before plowing into the earth in a “high energy impact” at a speed of approximately 575 miles per hour."
Checkmate - they were damned if they did (use trim cutout switches) and damned if they didn't. Seems that at the point they shut of the system the AND trim was more than the elevators could overcome and with ever increasing speed in the dive manual trim was not an option. what would you do? try flying inverted (as with the air Alaska accident )? May explain the last minute roll .
What a mess.