What was found
EMERGENCY LIGHTING: APPROACHING AIRCRAFT FOR PREFLIGHT, FORWARD EMER EXTERIOR LIGHTS ARE ILLUMINATED. EMER LIGHTS SWITCH IS IN THE OFF POSITION IN THE COCKPIT. MAIN AIRCRAFT BATTERIES ARE UNPLUGGED. ///SIGN-OFF/// ARRIVED AT AIRCRAFT AND OBSERVED ALL EMERGENCY LIGHTS OFF. POWERED A/C AND ALLOWED 1 HOUR TO CHARGE EMERGENCY LIGHTS IN ARM POSITION. PERFORMED FUNCTIONAL CHECK OF EMERGENCY LIGHTING REF CL350 AMM 33-51-00. NO DEFECTS NOTED AT THIS TIME.