As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER TANK FUEL QTY INDICATOR BLANKED SEVERAL TIMES DURING FLIGHT. ACFT GROUNDED. REPLACED FQIS PROCESSOR UNIT IAW MM 28-41-81-000-801, MM 28-41-81-400-801. PERFORMED OPS TEST, FUEL QUANTITY INDICATING SYSTEM IAW MM 28-41-00-710-801. ALL TESTS PASS.