As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2525 - YD 1 INOP STATUS MESSAGE. RETURNED TO THE GATE. DEFERRED IAW MEL REF 22-22-1 PLACARD NR 355850, AIRCRAFT RETURNED TO SERVICE. REPLACED THE YAW DAMPER LINEAR ACTUATOR. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.