What was found
RUDDER TRIM MIGRATING LEFT AND RIGHT BELLOW 230 KIAS. NO MISBEHAVIOR ABOVE 230. NO EICAS MESSAGES OR OTHER FAULT. REMOVED FROM SERVICE. INTERROGATED CMC FOUND NO FAULT CODES, PERFORMED GVI OF RUDDER AND TRIM, FOUND NO DEFECTS, PERFORMED RUDDER TRIM ACTUATOR FUNCTIONAL TEST IAW E175 AMM TASK 27-24-01-720-801-A, RUDDER TRIM INDICATOR ON EICAS MOVES AS REQUIRED FHDB DOWNLOAD PERFORMED AND SENT, IAW E175 AMM TASK 45-45-00-00-970-801-A, PER MTX REQUEST, NO FURTHER DEFECT NOTED. REPLACED RUDDER TRIM ACTUATOR.