The run from Germany to Miami is is fixed.
If there are additional repairs that are not finished, they will put the work crews on the ship and they will finish enroute.
Just as an FYI, when the Norway has the sprinkler system problem last May. NCL flew in a charter flight of plumbers from Poland for the repairs to get the ship back at sea by the next sailing date.
PS. If you have not been on the Norway, boy are you in for a wonderful week. She is truly the only classic left, Bon Voyage.