As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE REDUCTION GEARBOX WAS SENT FOR INVESTIGATION OF METAL CONTAMINATION AND OVERHAUL. DISASSEMBLY OF THE RED GB REVEALED THE SOURCE OF THE METAL CONTAMINATION WAS A SPALLED #10 BEARING. THIS BEARING IS A LIFED ITEM AND IT IS THE OPINION OF THE REPAIR SHOP THAT THIS BEARING FAILED AT REACHING THE END OF ITS LIFE.