What was found
PRIOR TO FIRST FLIGHT OF THE DAY, CREW REPORTED THE FOLLOWING EMERGENCY LIGHTS INOPERATIVE: FLOOR LEVEL AFT OF ROW 5, LT OVERWING EXIT, TOP, RT OVERWING EXIT, LOWER, AFT 2 LT EXTERIOR OVERWING EXIT LIGHTS AND AFT 2 RT EXTERIOR OVERWING EXIT LIGHTS. MAINTENANCE INSPECTED, R & R NR 4 EMERGENCY BATTERY AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.