What was found
SEA FLIGHT NR 2439: DEICE PRESSURE CAUTION ILLUMINATED AFTER BOOTS SELECTED TO SLOW. AS PER CHECKLIST, CAUTION CLEARED. SELECTOR TO SLOW, DEICE CAUTION LIGHT ILLUMINATED AGAIN. NR 2 BOOT SET ON RIGHT WING WILL NOT INFLATE. CORRESPONDING LIGHT DOES NOT ILLUMINATE. PRESSURE NORMAL DURING ALL BOOT CYCLES. MAINTENANCE STARTED NR 1 ENGINE. INSPECTED RT WING BOOTS, NDN, CYCLED BOOTS 4 CYCLES, NDN, CYCLED BOOTS IN SLOW, NDN, CYCLED BOOTS IN FAST, NDN, (3 CYC MADE IN FAST AND SLOW) STARTED NR 2 ENGINE. CHECKED BOOTS ON LT WING, NDN, CYCLED BOOT IN MANUAL FOR 3 CYCLES, NDN, CYCLED BOOTS IN SLOW FOR 3 CYCLES, NDN, CYCLED BOOTS IN FAST FOR 3 CYCLES NDN, STARTED NR 1 ENGINE. CYCLED BOOTS FOR 3 CYCLES EACH IN MANUAL, SLOW AND FAST, NDN. INTEROGATED CDS NO RELATED FAULTS FOUND. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.