What was found
IAH - FLIGHT 2749, THE CREW REPORTED THE NR 2 ENGINE FIRE DETECTION SYSTEM FAILED IN FLIGHT. THE ACFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MX INSPECTED THE ACFT, AND REPAIRED WIRES W407-0011-20 & W407-0012-20 NEAR CONNECTOR P0914, OPS CHECKED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.