As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, CREW REPORTED CENTER FUEL TANK QUANTITY INDICATOR WENT BLANK. NO EICAS MESSAGE DISPLAYED. NORMAL INDICATIONS RETURNED DURING FLIGHT. T/S PER FIM 28-41-00 FIG 114. PERFORMED FQIS PROCESS OR BITE PER FIM 28-41-00/101 FIG 104. NO PRESENT FAULTS. RECORDED FAULT HISTORY AND FORWARDED TO TECH SERVICES. REF TSI 00054031. ERASED FAULT HISTORY. PER FIM, SYSTEM CHECKS OK.