What was found
LEFT WING TO BODY OVERHEAT LIGHT ILLUMINATED AT FL350. RAN QRH & DESCENDED. LIGHT EXTINGUISHED.DURING DESCENT THRU 15,500 FEET AFTER RUNNING QRH FROM PREVIOUS WRITE-UP, RIGHT WING TO BODY OVERHEAT ILLUMINATED. RAN QRH, CONTINUED DESCENT, LIGHT EXTINGUISHED AROUND 9,500 FEET. ACFT GROUNDED. FOUND RT BLEED AIR DUCT BLOWN OUT AT END OF DUCT. INSTALLED A NEW DUCT AT RT BLEED FWD AND OPS CHECKED NORMAL. NO LEAKS IAW AMM 26-18, TASK 801.