What was found
DEICE PRESS CAUTION ILLUMINATED IN FLIGHT. RAN THE CHECKLIST AND FOUND THE RIGHT OUTBOARD BOOT FAILED TO INFLATE. RETURNED TO FIELD. REMOVED FROM SERVICE. CHECKED CDS & FOUND ICE PROTECTION FAULT "LOW PRESSURE 2A FAIL" INFLATED RIGHT OUTBOARD DEICE BOOTS & PERFORMED VISUAL & TACTILE INSPECTION. NO DEFECTS FOUND & BOOTS INDICATED NORMALLY. R&R #2 DDV FOR PRECAUTIONARY MEASURES IAW Q400 AMM TASKS 30-11-16-000-801 & 30-11-16-400-801 PER Q400 FIM TASK 30-10-00-810-804. CDS FAULTS CLEARED. OPERATED DEICE BOOTS IN AUTO & MANUAL MODE SEVERAL TIMES. ALL INDICATIONS NORMAL & NO CDS FAULTS RETURNED. AIRCRAFT RETURNED TO SERVICE.