As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING COURTESY CHECK FOR FLIGHT 4393 MAINTENANCE FOUND THE LEFT FORWARD WING EMERGENCY LIGHT TO BE INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED NR 1 EMERGENCY SUPPLY BATTERY HOLDER. THE OPERATIONAL CHECK WAS GOOD IAW EMB AMM 33-50-04. THE AIRCRAFT WAS RETURNED TO SERVICE.