What was found
ON 2ND FLIGHT APPROACHING DESCENT INTO KMEM, LOWER AFT BODY OVERHEAT LIGHT CAME ON. FOLLOWED QRH AND ISOLATED RIGHT PACK AND RIGHT BLEED (NR 3) ALONE W/ THE CARGO HEAT OUTFLOW. FINDING SAME AS REPEAT WRITE-UP. SYSTEM TEST GOOD, ALL C/BS CHECK GOOD. BEGAN TROUBLESHOOTING AS PER 727-200 AMM 26-14-000-1. INSPECTED ALL DUCTS WHILE PRESSURIZED, FOUND NO LEAKS. FOUND DETECT LOOP ALMOST TOUCHING A DUCT IN KEELBEAM AREA. PER M/M, NO LOOP IS TO BE LOCATED CLOSER THAN 2 INCHES TO DUCT. REALIGNED LOOP ACCORDINGLY. CLOSED ACCESS PANELS. USED TEMPERATURE SENSING LASER GUN TO SCAN AFT CARGO BELLY. NO UNUSAL TEMPS DISCOVERED. SUSPECT KEELBEAM LOOP AT FAULT.