As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2474: PROP DEICE CAUTION LIGHT ILLUMINATED IN FLIGHT ON NR 1 SIDE. RESET ONE TIME PER EA CHECKLIST. CAUTION LIGHT ILLUMINATED AGAIN. MAINTENANCE REMOVED AND REPLACED LT PROP NR 5 BLADE PROP DEICE WIRE HARNESS IAW Q400 AMM 61-00-06-000-805 AND 61-10-06-400-805. OPS CHECK GOOD IAW Q400 AMM 36-61-00-720-802. AIRCRAFT RETURNED TO SERVICE.