What was found
ON FLIGHT 3309 DURING TAKEOFF THE CREW REPORTED, RECEIVED AN UNCOMMANDED YAW DAMPER ENGAGEMENT AND A YAW DAMPER FAIL MESSAGE ON EICAS. THE TAKEOFF WAS ABORTED. AFTER THE AIRCRAFT CLEARED THE RUNWAY THE YAW DAMPER DISENGAGED AND "YAW DAMPER FAIL" MESSAGE ON EICAS RE-APPEARED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE INTEGRATED COMPUTER-600 NR 1 AMM 31-42-01 THE OPERATIONAL TEST WERE GOOD IAW AMM 22-11-00. THE AIRCRAFT WAS RETURNED TO SERVICE.