As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2287 - EWR - FLIGHT CREW REPORTED THAT, EN ROUTE FROM EWR TO CMH, FMS FAILED, BOTH PFD'S AND NAVS ALSO WENT OUT. CREW PERFORMED AIR RETURN AND LANDED UNEVENTFULLY. EWR MX REMOVED AND REPLACED CAPT DC550 AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.