As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2489 - RIC - AFTER TAKEOFF, FLIGHT CREW REPORTED ELECTRICAL EMERGENCY ABNORMAL MESSAGE ON EICAS AND PERFORMED AIR RETURN. RIC MX REMOVED AND REPLACED RELAY K0021 AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE. (S)