As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED CHANGE IN ENGINE SOUND PITCH AND RETURNED TO BASE. AME CONFIRMED NOISE WAS COMING FROM TURBINE SECTION. ENGINE WAS REMOVED AND CONFIRMED THAT TURBINE SECTION HAD MULTIPLE BLADES MISSING. TURBINE BEING FORWARDED FOR TEAR DOWN INSPECTION. WILL UPDATE SDR WITH RESULTS OR CAUSE IF FOUND.