Just curious, full electrical failure, no batt or gen power...can the Airbus be flown?
Yes, the airplane will fly in mechanical backup, that is mechanical control of THS via the trim wheel, mechanical control of the rudder and finally the thrust via the normal thrust lever control. It is a very very unlikely situation, because you need so many failures to end up in this situation that it is really unlikely to happen, but still you can get yourself out of it.
Cheers.