As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE OVERHAUL OF ACCESSORY DRIVE GEARBOX, THE LOWER BEARING INSTALLED ON BEVEL PINION GEAR WAS FOUND TO HAVE WHAT APPEARS TO BE A SMALLER BALL IN THE BEARING AS COMPARED TO THE OTHERS. THE BEARING ALSO HAS ROUGH OPERATION WHEN ROTATED BY HAND.