What was found
DURING MAINTENANCE INSPECTION THE FOLLOWING EMERGENCY LIGHTS FAILED THE EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECK: FLOOR PROXIMITY LIGHTS NR 6, 7 AND 8 AISLE LIGHTS 3 AND 4 OVERWING EXIT LOCATOR (FWD),(LT AFT) EXTERIOR OVERWING LIGHT AND (RT AFT) EXTERIOR OVERWING LIGHT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE EMERGENCY LIGHTING SYSTEM NR 4 BATTERY AND CHARGER ASSEMBLY IAW EMB 145 AMM 33-50-04. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.