What was found
ENGINEERING INVESTIGATION REPORT. CONFIRMED THAT ENGINE DID HAVE METAL CONTAMINATION OF THE OIL SYS. THE SOURCE OF METAL CONTAMINATION WAS THE NR 3 BEARING (PN 3107493-01, S/N FC153527) WHICH HAD A THROUGH GOING CRACK ON THE ROLLER CAGE. THE CRACK ALLOWED THE CAGE TO EXPAND AND THE ADJACENT ROLLER ELEMENT TO TURN SIDEWAYS WITHIN THE POCKET RESULTING IN HEAVY SCORES/GOUGES THE OUTER RACE. THE REASON WHY THE CAGE ON THE BEARING CRACKED COULD NOT BE DETERMINED.