What was found
PDX FLIGHT NR 2353 PROP DE-ICE MASTER CAUTION LIGHT ILLUMINATED ENROUTE FROM GEG. EMERGENCY CHECKLIST ACCOMPLISHED. ATTEMPTED ONE RESET AS PER CHECKLIST. PROP DE-ICE LIGHT REMAINTED ILLUMINATED. MAINTENANCE REMOVED NR 2 SPINNER, INSPECTED PROP LEADS. ALL LEADS SECURE ON BLADES AND SPINNER BULKHEAD. FOUND RUBBER SEAL LOOSE. NO PARTS REPLACED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.