As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2340: RIGHT ENGINE INTAKE DEICE BOOT FAILS TO SHOW GREEN LIGHT INFLATION ON DEICE PANEL. BULB TEST OK AND DEICE PRESSURE NORMAL. DEICE PRESSURE CAUTION WOULD ILLUMINATE ON EVERY 2ND TO 3RD CYCLE. AIRCRAFT RETURNED TO SEA. MAINTENANCE C/W FUNCTIONAL TEST OF THE AIRFRAME DEICE SYSTEM IAW Q400 AMM 30-11-00-720-801. NO DEFECTS NOTED. CHECKED CDS FOR FAULTS. NO FAULTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.