What was found
FOR FLIGHT 4068 MAINTENANCE DISCOVERED THE EMERGENCY LIGHTS WERE LEFT ON OVERNIGHT. ALL OF THE EMERGENCY LIGHT BATTERIES WERE DEAD. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1, 2, 3 AND 4 EMERGENCY BATTERY AND CHARGER IAW WC 33-700-19. PART NUMBERS AND SERIAL NUMBERS FOR NR 1: 2013-1A, 71097, BA50933901, CO1622. PART NUMBERS AND SERIAL NUMBERS FOR NR 2: 2013-1A, 84695,BA509333901, CO2469. PART NUMBERS AND SERIAL NUMBERS FOR NR 3: 2013-1A, 109778,BA509333901, CO2464 .PART NUMBERS AND SERIAL NUMBERS FOR NR 4: 2013-1A, 109789,BA509333901, CO2639. THE OPERATIONAL CHECK GOOD WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.