As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CMH - FLT 3900 - ELECTRICAL EMERGENCY ABNORMAL MESSAGE ON EICAS AND EMERGENCY LIGHTS NOT ARMED. EMERGENCY LIGHT REMAINED ON AND BATTERY WAS DISCHARGING. AIRCRAFT RETURNED TO CMH. INSPECTED EMERGENCY LIGHTS, FOUND NO FURTHER DAMAGE, OPERATIONAL CHECK OF EMERGENCY LIGHT SYSTEM IAW EMB 140, AMM 33-50-00. OPS CHECK GOOD. RETURNED AIRCRAFT TO SERVICE. (M)