As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - RIGHT YAW DAMPER MESSAGE ALONG WITH TAIL HYDRAULIC VALVE MESSAGE DISPLAYED ON EICAS. EMERGENCY DECLARED LANDED DFW WITHOUT INCIDENT. REPLACED LEFT TAIL HYDRAULIC SHUTOFF VALVE AND GEN FIELD AND HYDRAULIC CONTROL PANEL. SYSTEM GROUND CHECKS NORMAL OPERATION.