What was found
DURING THE ROUTINE INSPECTION, FOUND NR 1 ENGINE OIL DEBRIS MESSAGE ON CMC, CENTRAL MAINTENANCE COMPUTER. INSPECTED FOR PARTICLES ON THE MAGNETIC INDICATOR PLUGS AND FOUND SWARF IAW MM. SENT OIL SAMPLE AND THE PARTICLES FOR ANALYSIS. THE ANALYSIS REPORT INDICATED POSSIBLE NR 4 BEARING FAILURE. THE ENGINE IS REMOVED FROM SERVICE. ENGINE WAS REMOVED FOR METAL DEBRIS AND SEND FOR REPAIR. UPON DISASSEMBLY, IT WAS FOUND NO.4 BEARING CUP LOCK WASHER WAS BROKEN UP IN PIECES. THE ENGINE WAS INSPECTED, REPAIRED, AND TESTED PER ROLLS-ROYCE MANUALS AND RETURN TO SERVICE. PENDING INSTALLATION ON THE AIRCRAFT.