As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CUSTOMER REPORTED AN UNUSUAL NOISE DURING THROTTLE TRANSITION TO POWER. ALL ENGINE INDICATIONS WERE NORMAL. ON-WING BORESCOPE INSPECTION OF LEFT-HAND ENGINE SERIAL NUMBER (ESN) 211417 REVEALED DAMAGE TO 3RD-STAGE INTERMEDIATE COMPRESSOR ROTOR BLADES AND ONE MISSING 3RD-STAGE BLADE. DISASSEMBLY OF ESN 211417 IN THE REPAIR STATION CONFIRMED REPORT OF ONE LIBERATED 3RD-STAGE INTERMEDIATE COMPRESSOR ROTOR BLADE AND DAMAGE TO ADJACENT 3RD-STAGE BLADES.