As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW OBSERVED LT FUEL QUANTITY FLUCTUATION AND FUEL QUANTITY INDICATION DASHED ON MFD, THEN FUEL QUANTITY RETURNED TO NORMAL. DURING TROUBLEHSHOOTING IT WAS FOUND LT WING TANK FUEL QUANTITY INDICATION WIRE HARNESS WAS DEFECTIVE. REPLACED THE WIRE HARNESS WITH NEW, OPS CHECKED GOOD. THE ACFT WAS RETURN TO SERVICE.