As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B-INSPECTION FOUND THE OVERWING EMERGENCY LIGHTS AFT INOPERABLE ON BOTH SIDES. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 4 EMERGENCY UNIT POWER SUPPLY IAW WC 33-700-19. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.