As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING SCHEDULED MAINTENANCE, THE EMERGENCY LIGHT BATTERY PACK AT POSTION 62WL WAS FOUND TO HAVE LOW VOLTAGE. MAINTENANCE REMOVED AND REPLACED THE AFFECTED EMERGENCY LIGHT BATTERY PACK AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)