Originally Posted by PuraVidaTransport
Looking back at the traces, there is around 15 seconds of nose-down stick from 2:13:45 to 2:14. The elevator was at 30 nose-up and in that 15 seconds of almost full nose-down stick, the elevator only moved to 15 nose-up. So even though the pilot commands nose-down, the fly-by-wire never moved the elevators to a nose-down position...for 15 seconds!!!
But as the CPT PITCH COMMAND is for ND the FO one is for NU, except for only 7 of those 15 seconds.
Also for that period the vertical acceleration is already slightly below 1.0 even with the elevators in a still UP position therefore the pitch law in force at the time is honored versus the request.
Direct Law would have been my choice too ... and also mainly for leaving the trim alone in the first place.