As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPERATION A "HOOTING" SOUND WAS PRESENT FROM IDLE THOUGH MCT POWER SETTING. A FIELD BORESCOPE INSPECTION REVEALED 1 OF THE IP COMPRESSOR BLADES HAD LIBERATED. THE REPAIR STATION INVESTIGATION HAS CONFIRMED THE FIELD FINDINGS. THERE WAS NO EVIDENCE OF UPSTREAM FOREIGN OBJECT DAMAGE (FOD).