What was found
CO-PILOT''''S AUTOPILOT SERVO FAILURE, AMBER A ANNUNCIATED, VIBRATION ASSOCIATED WITH FAILURE PRIOR TO SERVO FAILURE. EXECUTED QRW PROCEDURES, VIBRATION REMAINED. REMOVED AND REPLACED AILERON SERVO, IAW MM 22-10-09, OPS CHECK GOOD. P/N 622-5734-002, S/N ON 10041, S/N OFF 5234.