As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, UNWANTED FUEL TRANSFER FROM RIGHT MAIN TANK TO CENTER TANK DURING CRUISE. PROBLEM PERSISTED THROUGHOUT THE ENTIRE FLIGHT. PRESSURIZED FWD & AFT RH FUEL PUMPS FOR 1 HOUR PER FIM 28-21 F/T 821. NO FUEL TRANSFER OBSERVED. SYSTEM IS CONSIDERED OK AT THIS TIME.