What was found
IAH - FLIGHT 2556, DURING POST-FLIGHT INSPECTION, THE CREW REPORTED THAT NUMEROUS EMERGENCY LIGHTS WOULD NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO EMERGENCY LIGHT BATTERY PACK IAW EMB-145 AMM 33-50-04, OPERATIONALLY CHECKED GOOD, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.