As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLE SHOOTING FOR AN UNUSUAL NOISE DURING FLIGHT, A FIELD BORESCOPE INSPECTION FOUND DAMAGE TO THE HPC ROTOR AND A MISSING 3RD STAGE IP ROTOR BLADE. DISASSEMBLY OF THE ENGINE REVEALED THAT ONE OF THE 3RD STAGE IPC ROTOR BLADES WAS MISSING.