What was found
THREE MAIN CABIN DOOR EMERGENCY LIGHTS INOP. WITH BATTERY OFF & LIGHT SWITCH ON, ALL EMERGENCY LIGHTS ILLUMINATE EXCEPT 3 MAIN CABIN DOOR EXIT LIGHTS. WITH BATTERY OFF AND LIGHT SWITCH IN THE ARM POSITION, ALL EMERGENCY EXIT LIGHTS ILLUMINATE EXCEPT THE 3 DOOR EMERGENCY LIGHTS. SWAPPED BATTERIES AND THE FORWARD BATTERY WAS MALFUNCTIONING. PLACED THE AFT BATTERY IN ITS ORIGINAL POSITION. REPLACED THE FORWARD BATTERY AND ACCOMPLISHED A TWO HR CHARGE. FUNCTIONAL TESTED THE EMERGENCY LIGHT SYSTEM, NO DEFECTS NOTED. WORK ACCOMPLISHED MM 33-50·01.