As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW HAD ASYMMETRICAL FLAP INDICATION ON APPROACH. MADE NORMAL LANDING. CHECK OF THE FLAP INDICATION SYSTEM ON THE GROUND WAS ACCOMPLISHED AND NO DEFECTS WERE NOTED. THE FLAP POSITION INDICATOR (N54) WAS REPLACED AS A PRECAUTION. SYSTEM HAS FUNCTIONED PROPERLY SINCE INDICATOR REPLACEMENT. UPON INTERNAL INSPECTION OF THE INDICATOR, IT WAS FOUND THAT AN INTERNAL NUT, SPACER AND WASHER CAME LOOSE AND CAUSED A DISTORTION IN THE MAIN SHAFT RUNNING THE LENGTH OF THE INDICATOR.