As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE REDUCTION GEARBOX (RGB) WAS SENT FOR INVESTIGATION AND REPAIR BECAUSE THE RGB WAS MAKING METAL. THE CAUSE OF THE RGB MAKING METAL WAS AN AXIAL CRACK ON THE INNER RACE OF THE #19 BEARING AND THE SPALLING OF THE #18 BEARING INNER RING PLAIN HALF.