HN39,
I'm puzzled by something. I would like to know what significance it has and would welcome any comments:
It appears that each time the FDs become available again and engage in HDG/VS mode the selected V/S in the FCU window resets to the instantaneous V/S.
EDIT: "Vitesse verticale sélectée" = Selected V/S = target vertical speed for AFS in HDG / VS mode, normally adjustable by a knob on the FCU.