What was found
CLL - EMERGENCY LIGHTS LEFT ON, BATTERY PACKS DEAD. REPLACED FOUR BATTERY PACKS, POSITIONS 20LN, 21LN, 23LN, AND 24LN. PERFORMED OPS CHECK WHICH CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. BATTERY PACK S/N'S 1129, 1130, 1143, 1164. (X)