As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSTALLATION OF AN AIR/OIL SEPARATOR, REMOVED THE AIR CONDITIONER ACCESSORY DRIVE OFF THE STARTER SHAFT TO INSTALL AN OIL RETURN FITTING FOR THE AIR/OIL SEPARATOR. UPON REMOVAL OF THE ACCESSORY DRIVE HOUSING, PIECES OF THE AIR CONDITIONER DRIVE BEARING FELL OUT OF THE HOUSING, FURTHER EXAMINATION REVEALED TOTAL DISENTIGRATION OF CAGE FOR BALL BEARINGS.