Hi Cristianwold,
Here is the FCOM Sequence:
FAC1 - OFF then ON
" Aircraft is out of trim due to right aileron up float ...
Resetting FAC 1 permits to recover rudder trim even if no indications is available "
Upfloat of control surfaces will happen every time there is the total loss of hydraulic power for that surface. Having said this, I think the situation above might be interpreted as "damping mode" of ailerons that are being powered by Blue Hyd Sys only through the RAT ...
As FAC also provide Turn Coordination, it directly influences ailerons which cause FAC to give a computer error in guiding them to the desired position, so FAC should be reset in order to restore the rudder trim ...
That's what I think ... but probably I'm getting wrong !
Best Regards,
captain87