As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CAPTAIN REPORTED THAT LEFT MAIN FUEL QUANTITY INDICATOR WENT BLANK DURING CRUISE. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NUMBER EIGHTEEN AND TWENTY TANK PROBES. SYSTEM GROUND CHECK NORMAL OPERATION.