What was found
RIGHT TURN BIAS IN FLT. NO MORE THAN 315KIAS. AUTOPLT MADE LONG LFT TURN. RIGHT TURNS NORM. TRIMED OUT TO 4 UNITS WHILE MANUAL FLYING AND STATED STILL ROLLING RIGHT AND MAKING LONG LEFT TURNS. AT 315 KNTS THEY HAD 2 UNITS OF RUDDER TRIM, ALSO STATED DIDNT THINK IT WAS CROSS WIND. FUEL LOAD WAS NORMAL & BALANCED . ALSO STATED IT HAPPENED WITH AUTOPILOTS ON OR OFF . WHEN AUTOPILOT WAS ENGAGED, YOKE SHAKED WITH LT OR RT AUTOPILOT. PERFORMED BITE & NO MESSAGES FOUND. PERFORMED A WALK AROUND & NO DEFECTS NOTED. MCDP LAST F LT FAULT SHOW MSG A/P CTN MODE ERROR WITH DIAG CODE 112430. IAW FIM 22-02 TASK 801 TABLE 204, AILERON SERVO POSITION & AILERON SURFACE POSITION DO NOT AGREE BY MORE THAN 3.0 DEGREES. REF FIM 2 2-04 TREE 821, RAN TEST 66 FOR AILERON SURF DEG PER SH 4 BLK 5. PER BLK 107, VALUES SHOW ARE (L)+00.7 (C) +00.1 AND (R) +00.3. PER B LK 211, . ADJUSTED LT AUTOPILOT LATERAL CONTROL SERVO WITH THE MCDP, PERFORMED TEST 66 TEST PASSED IAW AMM 22-03-404-015 SUBTASK G 22-03-434-029.