What was found
CMH FLIGHT 3961 THE CREW REPORTED A BURNED PLASTIC ODOR COMING FROM THE REAR OF THE CABIN. THEY REPORTED THE ODOR SEEMED TO BE ASSOCIATED WITH THE APU AND THE NR 2 PACK.THE AIRCRAFT WAS RELEASED IAW MEL 21-51-00/1. MAINTENANCE INSPECTED AND PERFORMED OPERATIONAL CHECKS OF THE APU AND NR 2 PACK. NO DEFECTS WERE FOUND. MAINTENANCE FOUND THE AFT EMERGENCY FLASHLIGHT CHARGER ASSEMBLY BURNED. THE CHARGER ASSEMBLY WAS REPLACED.