What was found
WHEN OPERATING DEICE BOOTS IN SLOW, FAST OR MANUAL, THE NR 1 OUTBOARD HORIZONTAL STAB LIGHT COMES ON FOR A MOMENT THEN EXTNGUISHES. THEN GET A DEICE CAUTION LIGHT. PERFORMED THE EM CHECKLIST AND ALL THE DEICE PRESSURES WERE NORMAL. MAINTENANCE PERFORMED VISUAL INSPECTION LT OUTBOARD HORIZONTAL STAB BOOT. NO DEFECTS NOTED. PERFORMED FUNCTIONAL TEST OF AIRCRAFT DEICE SYSTEM IAW AMM 30-11-00-720-801. NO DEFECTS NOTED. NO CAUTION LIGHT. DEICE PRESSURE NORMAL. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.