As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTING: WITH SHIP POWER OFF PASSENGER SAFETY LIGHTS EMERGENCY EXIT LIGHT OVER MAIN DOOR AND FORWARD HALF OF FLOOR LIGHTS DO NOT WORK, BUT ALL THE LIGHTS WORK WITH BATTERY OR GPU OR SHIPS POWER ON. REMOVED AND REPLACED EMERGENCY LIGHTING BATTERY PACK IN REF TO CESSNA 560 XL/XLS AMM 33-50-01 OPERATIONAL CHECK COMPLIED WITH IN REF TO CESSNA 560 XL/XLS 33-50-00. NO DEFECTS NOTED