As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED AN APU FIRE MESSAGE IN FLIGHT. THE CREW COMPLIED WITH THE QRH AND THE MESSAGE DID NOT PERSIST. THE AIRCRFT LANDED AT EVV WITHOUT INCIDENT WHERE CONTRACT MAINTENANCE INSPECTED THE AIRCRAFT WITH NO DAMAGE NOTED. MAINTENANCE OPERATIONALLY CHECKED THE APU WITH NO DEFECTS NOTED. THE AIRCRAFT WAS SUBSEQUENTLY APPROVED FOR RETURN TO SERVICE.