As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LWR AFT BODY OVERHEAT CAUTION LIGHT ILLUM WITH NR 2 ENG AND 3 BLDS OPEN AND BOTH PACKS ON. RAN ALL 3 ENG PER JET RUN HDBK FOR 5 MIN, BLDS ON AND NO LEAK FOUND. FOUND LWR AFT LOOP CHAFING. REPOSITION LWR LOOP, OPS CHECK NORMAL PER B727-200 JET RUN HDBK.