What was found
MAINTENANCE REPORTED THE EMERGENCY LIGHTS FOR LEFT OVERWING AFT EXIT, CEILING EXIT RIGHT, AND EMERGENCY LIGHT IN BULLNOSE BETWEEN SEATS 9L AND 10L INOP. MAINTENANCE FOUND BATTERY PACK MOUNTED TO OVERHEAD BIN ABOVE ROW 11DEF WAS DEAD. REPLACED BATTERY PACK IAW AMM 33-51-51, TASK 962-015. EMERGENCY LIGHTS OPS CHECKS SATISFACTORY.