As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SHUTDOWN AN UNUSUAL SQUEAL WAS NOTED. INVESTIGATION REVEALED THE N1 SPOOL COULD NOT ROTATE AND BORESCOPE INSPECTION DISCOVERED A MISSING 3RD STAGE IP ROTOR BLADE. DISASSEMBLY OF THE ENGINE CONFIRMED TWO MISSING 3RD STAGE BLADES.