What was found
WITH THE EMERGENCY LIGHT SWITCH SET TO ARM AND THE PASSENGER SAFETY SWITCH SET TO OFF THE EMERGENCY LIGHT SYSTEM REMAINS ILLUMINATED BOTH INTERIOR AND EXTERIOR. WITH PASS SAFETY SWITCH OFF THE LIGHTS SHOULD BE EXTINGUISHED. CORRECTIVE ACTION FOUND BOTH G SWTICHES TRIPPED AND BATTERIES DISCHARGED. PER MMC THEY REQUESTED BOTH BATTERIES BE REPLACED. REMOVED AND REPLACED THE FORWARD AND AFT BATTERIES IAW TEXTRON MODEL 560 XLS AMM 33-50-01, WITH CUSTOMER SUPPLIED UNITS: FORWARD TESTED, AFT OVERHAULED, OPCRATIONAL CHECKS NORMAL NO FURTHER DEFECTS NOTED.