What was found
WHEN OVER POWERING STICK PUSHER A HEAVY ABNORMAL VIBRATION OCCURS. INSPECTED A/C AND FOUND MALFUNCTION IN CAPTAINS ASSY AND STILL HAVING FULL TRAVEL ON ALL FLIGHT CONTROLS. REMOVED AND REPLACED STICK PUSHER MECHANISM SERVO ACTUATOR AND CAPTAIN IAW SAAB 340 AMM 27-35-20. OPERATIONAL CHECK GOOD IAW SAAB 340 AMM 27-35-00, SERVO ACTUATOR P/N ON/OFF 501-1478-01, S/N ON 1041, S/N OFF 1120, CAPTAINS PIN ON/OF 501-1421-01 S/N ON 1313, S/N OFF 1103.