What was found
IAH - INSPECTION CHECK 1C, 2C, 4C - DURING A ROUTINE INSPECTION, THE AFT CABIN CENTER FLOOR BEAM BUTT STRAP WAS FOUND TO BE CORRODED BETWEEN FRAMES NR 33-39. MAINTENANCE REMOVED AND REPLACED THE DAMAGED PORTION OF THE BUTT STRAP AND THE AIRCRAFT WAS LATER APPROVED FOR RETURN TO SERVICE. (M)