Just out of interest, what would happen in this scenario?
The aircraft is following a CDA with DA set on in the ALT SEL window. G/S capture occurs, but for whatever reason, the Missed Approach Altitude isn't dialled in?
A G/A is required and perfomred with the A/T and A/P engaged. At 1000ft, FLCH or V/S is selected. Would the throttles start to retard?