What was found
WITH AUTOPILOT ENGAGED (INFLIGHT OPERATIONS) BOTH CONTROL COLUMNS JERK FORWARD AND BACK INTERMITTENTLY DURING FLIGHT. THE FO'S INCLINOMETER WOULD ALSO DEFLECT QUICKLY LEFT AND RIGHT THEN RETURN TO CENTER POSITION. THEN IT WOULD REPEAT. REMOVED AND REPLACED NR 1 AHC-85E. AP SYSTEM OPS CHECK GOOD IAW MM 22-10-00 AND AHC OPS CHECK GOOD IAW 34-21-00. COMPLIED WITH CAT II AS REQUIRED. P/N: 622-9336-402 S/N ON: 5GNX P/N OFF: 622-9336-400 S/N OFF: 468L