What was found
LOWER AFT BODY OVERHEAT LIGHT CAME ON 30 MIN INTO FLIGHT. COMPLIED WITH QRH & SECURED RIGHT PACK NR 3 ENG BLEED. LIGHT STAYED ON IAW QRH, MOVED NR 3 THROTTLE TO IDLE, AND OVERHEAT LIGHT IMMEDIATELY WENT OUT. QRH INDICATES LEAK IS BETWEEN NR 3 BLEED VALVE AND R/PACK VALVE. INSP DUCTING AND CHECKED CLAMPS. RAN ENG PER JRH & OPS CKD. NO FAULT OCCURRED. FOUND SLEEVES ON DUCTING TO S/O VALVE DETERIORATED. REMOVED AND REPLACED SLEEVES ON RT PACK SHUTOFF VALVE PER M/M 21-55-031-4. RAN NR 3 ENGINE PER JRH TO POWER, NO LEAKS OR FAULTS NOTED.