As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING MAINTENANCE INSPECTION SEVERAL EMERGTENCY LIGHTS WERE FOUND TO BE INOPERATIVE. MAINTENANCE FOUND THE NUMBER FOUR EMERGENCY LIGHT BATTERY PACK TO BE LOW. MAINTENANCE RECHARGED THE AFFECTED EMERGENCY LIGHT, OPERATIONALLY TESTED WITH NO DEFECTS NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.