As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2194, AFTER TAKING PROPS OUT OF FEATHER INTERMITTENT DEICE PRESSURE CAUTION LIGHT. DEICE PRESSURE INDICATES 12-14 PSI WITH POWER LEVERS AT DISC AND FLIGHT IDLE. MAINTENANCE REPLACED NR 1 ENG AND NR 2 ENGINE 55PSI AND 65PSI SWITCHES IAW Q200 AMM 21-11-21-000-801 AND 21-11-21-400-801. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.