As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MACH/SPD TRIM MSG FLAGGED FOR SDR REF. FIM 27-09 TASK 814 . NO EXISTING FAULTS IN EITHER LEFT OR RIGHT YAW DAMPER STAB TRIM MODULE. REPLACED R/H YAW DAMPER MODULE PER AMM 22-21-04 OPERATIONAL TEST GOOD, NO FAULTS NOTED AT THIS TIME. PARTS USED: 64-2221-9-0003,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1867694 SN OFF 0126 MODULE, ASSY, Y OFF 64-2221-9-0003 0126 ON 64-2221-9-0003 0172