What was found
IAH - FLIGHT 2087, THE CREW REPORTED A BLEED ONE LEAK AT FL180. THE ACFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MX INSPECTED THE ACFT AND R&R THE LT SIDE HORIZONTAL BLEED DUCT, OPS AND LEAK CHECKED WITH NO DEFECTS, AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.