As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPORTED THAT AFTER LANDING, PROPELLER SLOWED DOWN QUICKER THAN NORMAL. DURING SHUTDOWN THE PROPELLER DID NOT FEATHER AND CAME TO LOW SPEED STOP. INSPECTION OF THE ENGINES REVEALED GGT ROTOR BLADE SEPARATION. SUBJECT ENGINE WAS REMOVED FROM SERVICE AND SENT FOR REPAIR.