What was found
BTR - FLIGHT 2679, THE CREW REPORTED AN APU FIRE AT THE GATE AFTER AN UNSUCCESSFUL RESET. MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED THE APU ON MEL 49-00-00 CAT C CTL 117499, AND 26-22-00 CAT C CTL 117498. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. THE AIRCRAFT RETURNED TO IAH ON FLIGHT 2574 ON 03/11/07 AND MAINTENANCE REMOVED AND REPLACED THE APU, OPERATIONALLY CHECKED WITH NO DEFECTS, REMOVED THE MEL'S, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.