What was found
PILOT REPORTED TO MAINTENANCE ICE REMAINING ON TAIL AFTER LANDING. (SPECIFICALLY, BOTH HORIZONTAL SURFACE DEICERS.) OPERATIONAL CHECK OF BOOTS BROKE ICE FORM SURFACE, HOWEVER, A CLOSER INSPECTION OF SURFACE DEICERS REVEALED MINOR HOLES IN LEADING EDGES. FURTHERMORE, WHEN SUPPLY PRESSURE LINES WERE REMOVED, WATER WAS FOUND IN LINES TO THE BOOTS. BOOTS WERE REPLACED AND AIRCRAFT LINES CLEARED OF WATER USING DRY SHOP AIR AND ISOPROPHYL ALCOHOL.