What was found
FLIGHT 2193. ON TAKEOFF: ABNORMAL + FLUCTUATING OF RIGHT RUDDER NEEDED FOR CENTERLINE. ON LANDING: ABNORMAL AMOUNT OF RIGHT RUDDER NEEDED FOR CENTERLINE. ON TAXI: TRACKS STRAIGHT WITHOUT TILLER ENGAGING THE AIRCRAFT TRACKS LEFT. REMOVED FROM SERVICE. PERFORMED MCN E320065-01, PER PARA 8, ADJUSTED TRIM TO 0.9 (RH). TAXI CHECK NORMAL, NO FURTHER DEFECTS. RETURNED TO SERVICE. NO PARTS REPLACED.