As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - A FUEL LEAK WAS NOTED ON THE NR 2 NACELLE AND APPEARS TO BE NEAR THE FUEL DOOR. MAINTENANCE REPLACED THE O-RINGS AT THE MASTER REFUEL/DEFUEL SHUTOFF VALVE AND ABOVE THE FILLER PORT. OPERATIONAL AND LEAK CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.