As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT THE EMERGENCY LIGHTS REMAINED ON WHEN SELECTED OFF. THE LIGHTS WOULD EXTINGUISH WHEN THE GPU WAS CONNECTED AND THE REFUEL/DEFUEL PANEL POWER WAS SELECTED FROM NORMAL TO BATT. MAINTENANCE REPLACED THE NR 4 EMERGENCY LIGHT BATTERY WITH NO FURTHER DEFECTS NOTED.