As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT FOUND THE LEFT AND RIGHT OVERWING EMERGENCY LIGHTS TO BE INOPERABLE DURING AN OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED BATTERY HOLDER ASSEMBLY NR 4 AND THE BATTERY SUPPLY IAW EMB 145AMM. THE AIRCRAFT WAS RETURNED TO SERVICE.