What was found
EN ROUTE IAD-LHR, CREW RECEIVED ADVISORY MESSAGE FOR THE RIGHT WING PNEUMATIC SUPPLY INDICATING OVERHEAT CONDITION. AIRCRAFT RETURNED TO IAD. *S/D* THE RIGHT HAND PACK FAN INLET DIFFUSER HOUSING (P/N 810207-2) WAS FOUND WITH A TEAR AT THE RUBBER ACCORDION DUCT WHICH INTERFACED WITH THE HEAT EXCHANGER RAM AIR OUTLET. RT BLEED AUTO SHUTDOWN RESULTED WHEN HOT AIR FROM THE RAM AIR EXHAUST IMPINGED ON THE ZONE 7 OVERHEAT DETECTION SYSTEM. THE FAN INLET DIFFUSER HOUSING WAS REPLACED.