As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE TO DCA THE EICAS FUEL QUANTITY READOUTS GAVE AN AMBER MESSAGE ON THE LEFT TANK MAKING THE TOTAL QUANTITY ALSO UNKNOWN. THE CREW WAS ADVISED TO TRY AND RETURN TO CVG, BUT AFTER FOLLOWING THE QRH DECLARED AN EMERGENCY AND DIVERTED TO CRW. THE AIRCRAFT LANDED WITHOUT ISSUE AND TAXIED TO GATE UNDER IT'S OWN POWER. MX REPLACED FUEL QUANTITY GAUGING COMPUTER. OPS CHECK GOOD.