As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS REMOVED FROM SERVICE DUE TO A LOUD BANG AND ENGINE EXPERIENCED AN IN-FLIGHT SHUT DOWN. DISASSEMBLY OF THE ENGINE REVEALED A SECOND STAGE VANE CLUSTER WAS MISSING AND THE REMAINDER OF THE N1 TURBINE HAD MASSIVE DAMAGE. THE CAUSE FOR THE FAILURE IS STILL UNDER INVESTIGATION.