As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER FUEL TANK INDICATION DISPLAY IS SHOWING FAIL INTERMITTENTLY ON RE FUEL PANEL. GAUGE IN COCKPIT OPS NORMALLY. GROUNDED - YES. REMOVED AND INSTALLED NEW CENTER TANK REFUEL INDICATOR. PERFORMED WIRING INSPECTION REF B737-800 WDM 28-21-00-211801. NO DEFECTS FOUND. ACCOMPLISHED INSTALL TEST PER B737-800 AMM STEP G. REF 28-41-61-400-801. ALL CKS NML.