As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - BTB - RIGHT AFTER ENGINE START RECEIVED AMBER EICAS MESSAGE "L OIL FILTER". THIS WENT AWAY AFTER 15 SECONDS TO BE REPLACED BY A WHITE EICAS MESSAGE "L OIL FILTER. T/S PER FIM 79-35-00 MAG CHIP DET CK'D CLEAN. REMOVED AND REPLACED MAIN OIL FILTER PER AMM 79-21-05. OPS CK'D GOOD, LEAK CK GOOD. OK FOR CONT SERVICE.