As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
2 YAW DAMPER DISPLAYED ON EICAS AND YAW DAMP INOP LIGHT ILLUMINATED RIGHT AFTER TAKEOFF. TESTED RIGHT YAW DAMPER. TEST FAILED FAULTING THE RIGHT YAW DAMP ACTUATOR. LEFT YAW DAMPER OPS NORMAL PER MM, FAILED RT YAW DAMPER ACTUATOR. REPLACED RT YAW DAMPER SERVO PER MM. OPS CHECKED NORMAL.