As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETHIOPIAN AIRLINES OPERATED ENGINE REMOVED FOR METAL IN MAIN OIL STRAINER CHIP COLLECTOR. DISASSEMBLY INSPECTION REVEALED HEAVY SPALLNG ON ONE BALL OF THE NR 1 MAIN BEARING. THE BEARING WILL BE SENT TO PRATT & WHITNEY ENGINEERING FOR INVESTIGATION. CYCLES: 569.