What was found
DURING PREFLIGHT WHILE CHECKING THE EMERGENCY BATTERY, WE DISCOVERED THE EMERGENCY AISLE LIGHT UNDER SEAT 3 AND THE RIGHT WING INSPECTION LIGHT DO NOT WORK ON THE EMERGENCY BATTERY PACK. LIGHTS DO WORK ON SHIPS POWER. CORRECTIVE ACTION: REMOVED #2 EMERGENCY BATTERY (P/N: CBS28-1 S/N: 009374) DUE TO INOP REPLACED IT WITH CUSTOMER SUPPLIED NEW ITEM (P/N: 6430028-1 S/N: H25-12338). PERFORMED OPERATIONAL CHECK, OPS CHECK IS GOOD. ALL WORK IS DONE IN REF TO CE-680A AMM 33-50-06.