As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CR FLT AT FL350 BOTH PACKS ON GOT A LWR AFT BODY OVERHEAT WARNING LIGHT. COMPL WITH RED TABS. WHEN R/PACK & ENG NR 3 BLEED AIR VLVS CLOSED, LIGHT WENT OUT WITH THROTTLE NR 3 REDUCTION. SYSTEM CK GOOD. LEFT RT PACK AND NR 3 BLEED SWITCHES CLOSED. REPEAT WRITEUP. REMOVED LT & RT AFT BODY DET LOOPS, LWR BODY DET LOOPS, AND K/ BEAM DET LOOP PER MM 26-14-001-2. FOUND R/AFT BODY LOOP TOUCHING AIR CLEANER PURGE VLV. ROUTED NEW LOOP AWAY FROM VALVE. TESTED NORM.