What was found
CABIN EMERG LIGHT: WITH THE BATTERIES OFF THE EMERGENCY LIGHTS WILL NOT ILLUNINATE IN THE EMER LTS ON POSITION // SIGNOFF// GAINED ACCESS TO AIRCRAFT AND FOUND WITH MAIN BATS CONNECTED AND SWITCHES OFF THE EMERGENCY LIGHTS WILL NOT TURN ON WITH SWITCH AND ARM OR ON POSITION. REMOVED #1 LH FWD EMERGENCY BATTERY PACK UC019 AND INSTALLED A REPAIRED BATTERY PACK IAW CE800 AMM 22-50-07 ALL OPS CHECKS GOOD IAW CE700 AMM 33-50-00. SYSTEM IS OPERATING AS DISERVICED.