As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTB DUE TO LT ENG FUEL FILTER WARN EICAS MSG/C FWD TO MCO PLACARD PER MEL 73-34-01A. R & R FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW AMM. OPS CHECK OK. LEAK CHECK OK. MESSAGE DID NOT RETURN MCO AND PLACARD REMOVED. ETOPS CATEGORY 'F': ANY OTHER EVENT DETRIMENTAL TO ETOPS