What was found
FLT 1264, AUS-BOS, AIRCRAFT REQUIRES EXCESSIVE RIGHT YAW TRIM AT HIGH SPEED. NEEDED 1/3 TO 1/2 RIGHT TRIM FOR COORDINATED FLIGHT IN CRUISE. SEEMED TO TRIM BACK TO CENTER AT SLOW SPEED. ACFT IS CURRENTLY OUT OF SERVICE. REMOVED & REPLACED RUDDER PER EA E08-045 REVISION A PART 1, RUDDER RIGGING ACCOMPLISHED PER AMM 27-20-00, RUDDER BACKLASH PER AMM 27-20-00-720-801-A/500 AND OPERATIONAL TEST OF THE RUDDER CONTROL SYSTEM PER AMM 27-20-00-710-801-A/500. ACCOMPLISHED CHECK FLT. ALL OPS CHECK OK.