What was found
ON APPROACH, HAD DEICE PRESSURE CAUTION LIGHT. RAN E/A CHECKLIST. CAUTION LIGHT REMAINED ILLUMINATED. PRESSURE DID NOT CHANGE AT ANY TIME. REMAINING APPROX 18 PSI. ADVISORY LIGHT FOR THE IB BOOT ON THE NR 2 SIDE, ON THE TAIL DID NOT ILLUMINATE. MAINTENANCE DRAINED TAIL DEICE BOOT LINES IAW AMM TASK 30-11-00-680-801, TPR 30-060. NO WATER NOTED. C/W FIM TASK 30-10-00-810-801 AND C/W FUNCTIONAL TEST OF AIRFRAME DEICING SYSTEM IAW AMM TASK 30-11-00-720-801. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.