As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2512. RECEIVED A FUEL CHANNEL 1/2 CAUTION MESSAGE. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. MAINTENANCE FOUND WATER ON THE FUEL QUANTITY GAUGING COMPUTER AND TRAY. REPLACED FQGC AND CLEANED AREA OF WATER. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.