What was found
DE-ICE PRESS CAUTION LIGHT ILLUMINATED IN CLIMB THROUGH FL180. RAN CHECKLIST, NOTICED SECOND FROM WINGTIP BOOT WAS NOT ILLUMINATING. DE-ICE PRESS CAUTION REMAINED ON. RETURNED TO FIELD. LANDING UNEVENTFUL. AIRCRAFT REMOVED FROM SERVICE. RAN ENGINES AND OPERATED AIRFRAME DEICE SYSTEM. DISCREPANCY DUPLICATED. NOTED CDS FAULT LOW PRESSURE 2B FAIL. REMOVED LE 613 AR REF AMM TASK 57-23-01-000-801, FOUND AIR LINE TO BOOT TORN. REPLACED LINE WITH NEW FROM STOCK. REINSTALLED LE 613 AR IAW AMM TASK 57-23-01-400-801. OPS TEST GOOD. ALL BOOTS INFLATE, NO DEICE PRESS CAUTION, NO FAULTS IN CDS. NO FURTHER DEFECTS. RETURNED TO SERVICE.