As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4657 DURING CRUISE AT LIGHT LEVEL 3400 THE CREW REPORTED THEY RECEIVED A RUDDER, INBOARD FLIGHT SPOLIER AND INBOARD SPOILERS MESSAGE ON ED 1. THE CREW FOLLOWED THE APPROPRIATE CHECKLIST AND AOM VOL 1 AND DECLARED AN EMERGENCY AND RETURNED TO LGA. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1 SSCU IAW CRJ AMM 27-61-05. THE OPERATIONAL CHECK WAS GOOD NO MSG ON EICAS. THE AIRCRAFT WAS RETURNED TO SERVICE.