Damaged guages on some planes still show working needles. I don't remember exactly, maybe it was the IAR 80, or something else, but when the vertical airspeed indicator and the turn and slip indicator were busted (black hole with wires and a spring) the needles and slip-ball were still "floating" in space and moving.
@SEE are you looking at the fuel quantity or fuel pressure? They are not obviously marked, and lots have confused them.
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