What was found
CREW REPORTED A "L BLEED DUCT" WARNING MSG. CHANGED TO A "L BLEED DUCT" CAUTION MSG THAT WAS ACCOMPANIED BY A "LEFT ENG BLEED CLSD" STATUS MSG. AIRCRAFT RETURNED TO CLT LANDING WITHOUT INCIDENT. MAINTENANCE FOUND LOOPS MT141 AND MT142 TOUCHING THE BLEED AIR DUCT. MAINTENANCE REPOSITIONED LOOPS OFF DUCT, OPERATIONAL, AND LEAK CHECKS GOOD. TROUBLESHOOTING AND TESTING WERE ACCOMPLISHED USING THE AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.