As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3822 - WITH THE EMERGENCY LIGHTS TURNED OFF. A PORTION OF THE FORWARD EMERGENCY LIGHTS REMAIN ILLUMINATED UNTIL THE AIRCRAFT MAIN BATTERY SWITCH IS TURNED OFF. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK IN POWER SUPPLY UNIT 61WL. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)