As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ACCESSORY GEARBOX REAR COVER IS BEGINNING TO CORRODE ON THE MOUNT PADS AND EXTERNAL SURFACES. REPAIRED IAW P&WC MM PART NO. 30B7302, REV. 17.1. A REINSPECTION IS REQUIRED AT EVERY AIRCRAFT MINOR INSPECTION UNTIL A PERMANENT REPAIR IS PERFORMED.