What was found
PDX FLIGHT NR 2355: DEICE PRESSURE CAUTION LIGHT ILLUMINATED DURING APPROACH. THE INBOARD HORIZONTAL STAB LIGHT ON CAPTAIN'S SIDE DID NOT ILLUMINATE. PERFORMED EM CHECKLIST AND DEICE PRESSURE WAS NORMAL. LIGHT WOULD NOT ILLUMINATE IF SELECTED IN FAST, SLOW OR MANUAL. MAINTENANCE INSPECTED LEADING EDGE AND FOUND CUT IN BOOT. APPLIED PATCH PER GOODRICH INSTALLATION INSTRUCTIONS. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.