TAKATA #565
So for a few seconds PNF was busy - doing what ever was necessary.
And PF was flying by SS, using those instruments without warning flags etc.
No one had the spare ability to scan, for this short time, or to notice that the THS ( which we never touch - we let it do its own thing...) has trimmed in only one direction, not cycling as usual -- a little NU followed by a little ND.
So PF was busy, too.