As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS LEVEL AT 38,000 FT AND THE CREW REPORTED THEY HEARD AN AUDIBLE THUD. UPON SCANNING THE COCKPIT INSTRUMENTS THE LT ENGINE WAS OBSERVED TO BE SHUTTING DOWN NON-COMMANDED. AIRCRAFT LANDED WITHOUT INCIDENT. INITIAL INSPECTION REVEALED THE LT ENGINE EXPERIENCED A NON-CONTAINED FAILURE IN THE AREA OF THE TURBINE SECTION. FAILED ENGINE WAS REMOVED FROM AIRCRAFT AND SHIPPED TO MFG FOR INVESTIGATIVE TEARDOWN. (K)