I've often wondered just how do-able that would be. I suspect it would not be very do-able and that we'd be better off to put the money into new planes. Maybe a few that have been put there recently could be revived.
The maintenance division there routinely activates aircraft to be placed back into service. A few years back a B-52 crashed, total loss. They pulled an H model out of deep storage and reactivated it to take the crashed planes place.
CC