As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED, WHEN TURNING THE LT ENGINE PROPELLER AFTER SHUTDOWN, NOTICED A GRINDING NOISE COMING FROM THE ENGINE. AFTER INVESTIGATION, THE ENGINE GEARBOX WAS OPENED AND THE FWD COMPRESSOR BEARING WAS FOUND DAMAGED AND TO BE THE CAUSE OF THE NOISE AND FRICTION. BEARING WAS REPLACED. NOTE THAT THERE IS A LIFE LIMIT TO THIS BEARING AND THAT THE BEARING IN CAUSE HAD NOT REACHED ITS LIFE LIMIT.