As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING FOR SUDDEN ITT SPLIT BETWEEN LH AND RH ENGINES, BORESCOPE INSPECTION DISCOVERED A MISSING 3RD STAGE IPC ROTOR BLADE AND POTENTIAL DAMAGE TO THE HPC ROTOR. DISASSEMBLY OF THE ENGINE CONFIRMED A MISSING 3RD STAGE BLADE.