As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT JETPIPE OVERHEAT CAUTION MESSAGE IN FLIGHT EN ROUTE FROM BNA TO DCA. CREW DIVERTED TO TYS AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED LEFT ENGINE JETPIPE LOOPS AND WIRING AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUAL. NO DEFECTS NOTED. AIRCRAFT RELEASED FOR SERVICE.