What was found
ETOPS SIGNIFICANT SYS - ON TAXI OUT THE RUDDER TRIM WOULD ONLY GO RT, COULD NOT GO LT TO RECENTER THE TRIM. REMOVED RUDDER TRIM CONTROL PANEL IAW AMM 27-21-23 TROUBLESHOT WIRING: WIRING FROM D1830 TO D1894 CHECKS OK. FOUND PIN 2 TO 1 ON RUDDER TRIM ACTUATOR HAS A OPEN CIRCUIT. REMOVED RUDDER TRIM ACTUATOR IAW AMM 27-21-11 13170 TO ACCESS. INSTALLED RUDDER TRIM ACTUATOR IAW AMM. INSTALLED AIL/RUDDER TRIM CONTROL PANEL IAW AMM 27-21-23. OPS CHECK GOOD IAW AMM 27-21-00/27-11-00. REINSTALLED PANELS REMOVED FOR ACTUATOR REPLACEMENT.