As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUBSEQUENT TO THE 1ST LPT NOZZLE FIELD REPLACEMENT FOR SERVICE BULLETIN FJ44-72-127, THE ENGINE DID NOT PASS THE REQUIRED VIBRATION SURVEY FOR 1E LP. BORESCOPE INSPECTION REVEALED A MISSING 3RD STAGE IP ROTOR BLADE AND A DAMAGED HPC ROTOR. DISASSEMBLY OF THE ENGINE CONFIRMED THAT ONE OF THE 3RD STAGE IPC ROTOR BLADES WAS MISSING.