As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS RETURNED TO THE REPAIR STATION WITH REPORTED BROKEN IP BLADES AFTER THE CUSTOMER REPORTED VIBRATION BETWEEN 15 PERCENT AND 8 PERCENT DURING SHUTDOWN. ON DISASSEMBLY, AND VISUAL INSPECTION, CONFIRMED THAT TWO BLADES WERE LIBERATED FROM THE IP ROTOR.