As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLT 3013 THE CREW REPORTED A "ENG 1 REV DISAGREE" ON THE EICAS IN FLIGHT. ALSO REPORTED A SPOILER FAIL MESSAGE ON THE EICAS. THE AIRCRAFT RETURNED TO CLE AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED RELAYS KO479 AND K1202. OPERATIONAL CHECKS WERE GOOD.