As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT CENTER TANK REFUEL VALVE INOPERATIVE, CLOSED WILL NOT OPEN. REPLACED REFUEL VALVE CONTROL UNIT IAW MM, NO HELP. ACCOMPLISHED FIM 28-21, TASK 816. FOUND MAINT MESSAGE 28-20050 ACTIVE AND HITTING LAST 15 FLIGHTS. FUEL QTY PROCESSOR HAS INTERNAL FAULT. REPLACED THE CONTROL RELAY K28317.