What was found
EMERG LIGHT SWITCH: WITH SHIP POWER OFF, EMERGENCY LIGHTS INTERMITTENTLY DO NOT ILLUMINATE IN THE "ARM" POSITION. THEY DO ILLUMINATE NORMALLY IN THE "ON" POSITION. TROUBLESHOT IAW CE-700 WD 33-50-01·01 TO DEFECTIVE EMERGENCY BATTERY PACK #1 E/N UC019 AND EMERGENCY LIGHTS SWITCH SI906. REMOVED BATTERY #1 AND REPLACED WITH REPAIRED UNIT IAW AMM 33-50-07. AS A PRECAUTION REPLACED RELAY KF125.REMOVED COCKPIT OVERHEAD SWITCH PANEL AND REPLACED WITH SERVICEABLE UNIT IAW AMM 33-10-57. EMERGENCY LIGHTS OPERATIONAL TEST IS SATISFACTORY. ALL LIGHTS REQUIRED OPERATIONAL TEST ARE SATISFACTORY IAW AMM33·00·00. BATTERY PACK #1 THE SWITCH PANEL HAS BEEN REMOVED SERVICEABLE FROM A/C N567QS: