As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT WING TANK FUEL QUANTITY READS 400 LBS MORE THAN WHAT WAS IN THE TANK CONFIRMED BY FUEL STICKING. GROUNDED - YES. REPLACED ALL NR 1 TANK FQIS UNITS AND COMPENSATOR UNITS ON WORK ORDER 12046M84-R-0-9. NR 1 TANK COMPENSATOR RESISTANCE AND CAPACITANCE CHECKED GOOD IAW AMM 28 41 21 710 801.