What was found
AIRCRAFT WAS GROUNDED: FLIGHT DIVERTED TO CMH ON ACCOUNT OF LEFT ENGINE OIL FILTER EICAS MESSAGE. THE LEFT ENGINE WAS SHUTDOWN. EMERGENCY WAS DECLARED. MAINTENANCE ACCOMPLISHED FIM TASK 79-35-00-815-803 ON #1 ENGINE. FOUND METAL ON CHIP DETECTOR AND IN THE OIL FILTER. ENGINE CHANGE HAS BEEN DECLARED. MAINTENANCE REMOVED AND REPLACED #1 ENG IAW JOB CARD 71-93-01. ALL GROUND CHECKS NORMAL. ASED ON THE CHIP DETECTOR SCREEN FINDINGS, THIS ENGINE EXIBITED CHARACTERISTICS OF A BEARINF FAILURE. THE HEAVY CONCENTRATION OF FERROUS MATERIAL ON THE B/C PUMP SCREEN/CHIP DETECTOR IS INDICATIVE OF POSSIBLE NO.4 BEARING FAILURE.