What was found
THE CREW REPORTED AN APU FIRE INDICATION IN FLIGHT, TRANSIENT MESSAGE. THE ACFT LANDED WITHOUT INCIDENT WHERE MAINTENANCE INSPECTED THE ACFT, FOUND NO INDICATION OF APU FIRE, OPERATIOPNALLY TESTED THE FIRE DETECTION SYSTEM WITH NO DEFECTS NOTED, OPERATIONALLY TESTED THE APU WITH NO DEFECTS NOTED, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.