As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LEFT TENTH STAGE DUCT RED MESSAGE IN FLIGHT EN ROUTE FROM HSV TO CLT. AIRCRAFT DIVERTED TO TYS AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE AIRCRAFT AND REMOVED AND REPLACED TWO (2) HEAT SENSING ELEMENTS IN THE LT TENTH STAGE DUCT LOOPS USING THE AIRCRAFT MAINTENANCE MANUAL. CHECKS WERE PERFORMED USING THE AIRCRAFT MAINTENANCE MANUAL. AIRCRAFT WAS RELEASED FOR SERVICE.