What was found
FLIGHT CONTROL CAUTION MESSAGE ON UPPER EICAS, CLEARS WITH PFC SELF TEST, REAPPEARS WITH THIRD HYS SYSTEM. TS INSTALLED NEW HYDIM CL AND CR REF MM, NO HELP. REPLACED HYDIM CR MODULE, OPS CK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT CONTROL CAUTION MESSAGE ON UPPER EICAS, CLEARS WITH PFC SELF TEST, REAPPEARS WITH THIRD HYS SYSTEM. TS INSTALLED NEW HYDIM CL AND CR REF MM, NO HELP. REPLACED HYDIM CR MODULE, OPS CK GOOD.