What was found
ON FLIGHT 3649 THE CREW REPORTED THAT DURING THE CLIMB AT 2,000 FEET RECEIVED A "RUDDER SYS 1-2 INOP" AND YAW DAMPER FAIL MESSAGES. A 'THUD' AND RUDDER PEDAL MOVEMENT NOTED WITH THE INITIAL FAILURE AND WITH SYSTEM 1 DURING THE AIRCRAFT OPERATIONS MANUAL CHECKLIST. AN EMERGENCY WAS DECLARED AND THE CREW ELECTED TO RETURN TO MIA. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. TROUBLESHOT T/S AS PER FIM 27-22-00-810-804-A PAGE 202 STEP 1 AND 3. REPLACED RUDDER PRESSURE SWITCH AS PER EMB AMM 27-23-04 OPERATIONAL AND LEAK CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.