Defacto I'm not sure your actually reading the post correctly or I just don't make any sense.
I'm talking about an actual scenario that happened I.e the aircraft pushed off stand selected the flaps and found a problem and went back to stand. The engineers said it was a flap gauge problem.
My question is what happens if the gauge goes bust in flight seeing as you can't just 'pull over to take a look' and there isn't a checklist for it.