As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRECT QUOTE FROM THE OPERATOR SUPARNA: THE ENGINE ESN706844 WHICH WAS JUST INSTALLED ON THE B1340 AIRCRAFT WAS ON FIRE. PILOT SHUT DOWN THIS ENGINE IN THE AIR. THE AIRCRAFT RETURNED TO DFW AND LANDED. GROUND TECHNIC CHECKED ENGINE FIRE WAS REAL AND VERY SERIOUS.