As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE INSPECTION FOUND BOTH OVER THE WING EMERGENCY LIGHTS INOPERABLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 4 EMERGNCY POWER SUPPLY AND CHARGER ASSEMBLY. THE OPERATIONAL CHECK WAS GOOD IAW EMB AMM 33-50-04. THE AIRCRAFT WAS RETURNED TO SERVICE.