As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
45 MINUTES OUT FROM JFK (JFK-LHR) EICAS MESSAGES FOR FLIGHT CONTROL SYSTEM AND FUEL FILTER. RETURN TO JFK. FUEL DUMPED. A FLIGHT CONTROL SYS EICAS STATUS MSG WAS CAUSED BY THE RT OUTBD FLAPERON MSG 2710303 PCU DOES NOT FOLLOW COMMAND. MAINT PERFORMED FIM TASK 27-11-817 WITH TEST PASS. RT OUT FLAPERON PCU WAS REPLACED 7/13/01. AIRPLANE HAS REPORTED NO FURTHER FLIGHT CONTROL PROBLEMS.