As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YAW DAMPER COUPLER DISENGAGED DURING CLIMB-OUT. WOULD NOT RE-ENGAGE. ITEM WAS DEFERRED IAW MEL. OPEN DEFERRAL WAS CLEARED BY REPLACING THE YAW DAMPER COUPLER. THE FAILURE WAS CONFIRMED BY REPAIR STATION. FAULTY COMPONENT WAS IDENTIFIED AS CHASIS FILTER. THE FILTER WAS REPLACED AND THE UNIT WAS TESTED AND APPROVED FOR RETURN TO SERVICE. (M)