As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE FORWARD EMERGENCY LIGHT AT THE LEFT WING/FUSELAGE IS INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1 BATTERY POWER SUPPLY ASSEMBLY IAW EBM 145 AMM 33-50-04. THE OPERATIONAL CHECK WAS SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.