As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CUSTOMER REPORTED A 'BANG'. FIELD TROUBLESHOOTING INDICATED THE N1 SPOOL WAS DIFFICULT TO ROTATE AND THERE WAS DAMAGE NOTED ON THE 3RD STAGE IP ROTOR BLADES. DISASSEMBLY OF THE ENGINE CONFIRMED FIELD FINDINGS AND ONE MISSING 3RD STAGE IP BLADE.