Originally Posted by
Ian W
My red highlight - This is true the pic shows that the MCAS ND trim was being recovered by NU trim which also inhibited MCAS until it ran again. This continues until just before the dive when for some reason the NU trim input is just brief inputs and insufficient to recover to normal 'level flight' trim position. MCAS runs as it has been and ND trim becomes unrecoverable. What changed for the last 5 or 6 trim switch inputs as they became blips rather than recover to level trim? Had the previous inputs been continued with we would not be having this discussion.
If the CVR is not found we will probably never know.
But there was also the AMP on board, maybe on the flight deck, maybe not, maybe to find out the root cause of the stick pusher and trim down after the AOA exchange before the flight before did not help. In that case though, what happened right after flaps up would have been expected by the crew, and not using trim cut out would have been by intention. Test flight with a full pax load, hard to believe, but ...