As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2340, YAW DAMPER HOT CENTERED MESSAGE APPEARED ON PFD. ATTEMPTED YAW DAMPER RESET BUT IT WOULD NOT RESET. MAINTENANCE REMOVED YAW DAMPER ACTUATOR IAW Q400 AMM TASK 22-11-36-000-801. INSTALLED NEW YAW DAMPER ACTUATOR IAW Q400 AMM TASK 21-11-36-400-801. OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.