What was found
AT FL400; CREW NOTED THAT YOKE WAS DISPLAYED TO RIGHT 3 UNITS; CORRECTED USING RUDDER TRIM. APPROX. 1 MINUTE LATER; CREW OBSERVED UNCOMMANDED RUDDER INPUT (SHARP YAW TO THE LEFT.) OCCURRED 3 TIMES. OCCURRED A TOTAL OF 3 TIMES IN FLIGHT.<[01] INTERROGATED #1 SMYD PER FIM 27-32 TASK 801. FOUND F/C 22-21-001 (SMYD YD FAULT) ON LEGS 12;14;21.;[02] REF TTG8Q01C1BJN- GVI OF RUDDER PCU AREA FOR CONDITION<BR> TTG8Q01C10ZL- R/R OF AILERON POS SENSOR -1<BR> TTG8Q01C1CXS- R/R OF A AND B AILERON AUTOPILOT ACTUATORS. COMPLIED SMYD BITE REF FIM 22-23 TASK 801. OKAY FOR SERVICE REF AMM 27-21-91; 22-11-33; 22-11-25;[03] INSPECTED REF [AMM 27-21-91 ALL ITEMS C/W AS REFERENCED.;[04] RII AND INSPECTED REF [AMM 27-21-91. ALL ITEMS C/W AS REFERENCED.;[05] CORRECTION TO TTG REF TO INCLUDE RUDDER PCU R/R<BR>TTG8Q01C10ZL- R/R OF AILERON POS SENSOR -1 AND R/R OF A AND B AILERON AUTO AILERON AUTOPILOT ACTUATORS<BR> TTG8Q01C1CXS- R/R OF RUDDER PCU<BR>. COMPLIED SMYD BITE REF FIM 22-23 TASK 801. OKAY FOR SERVICE REF AMM 27-21-91; 22-11-33; 22-11-25