As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE, THE MAIN TRANSMISSION DRIP PAN WAS REMOVED FOR OIL CHANGE WHEN IT WAS DISCOVERED THAT THE LOAD SIDE MOUNT WAS BROKEN IN HALF. AFTER REMOVAL OF THE MOUNT, SIGNIFICANT CORROSION WAS DISCOVERED INSIDE OF THE SEALED MOUNT.