As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG FUEL FILTER R EICAS MESSAGE ILLUMINATED 45 MINUTES AFTER DEPARTURE LATER WHEN THRUST WAS REDUCED MASSAGE BLANKED WHEN THRUST LEVERS ADVANCED MESSAGE RETURNED. CORRECTIVE ACTION: FOLLOWED FIM 73-11 TASK 801, R & R FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW B772 AMM 73-34 ENGINE RUN TEST PASSED AND LEAK CHECK GOOD. NO DEFECTS NOTED .