As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TROUBLE SHOOTING FOR ITT AND N2 SPLITS WITH THE SISTER ENGINE, A BORESCOPE INSPECTION FOUND DAMAGE AND A MISSING 3RD STAGE IP ROTOR BLADE. DISASSEMBLY OF THE ENGINE REVEALED THAT ONE OF THE 3RD STAGE IPC ROTOR BLADES WAS MISSING.