A B767 DEPARTING A FOREIGN ARPT DEVELOPED SMOKE AND FUMES FROM THE BUSINESS CLASS LAV. AN EMER WAS DECLARED WITH AN IMMEDIATE RETURN TO LAND.

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AFTER TKOF; PASSING 5000 FT; WE WERE CALLED BY THE FLT ATTENDANTS AND ALERTED TO SMOKE AND ODORS COMING FROM THE BUSINESS CLASS LAVATORY. WE ELECTED TO RUN THE 'SMOKE/FUMES/ODOR' EMER CHKLIST. AS WE STARTED THE CHKLIST WE WERE CALLED AGAIN THAT THE SMOKE WAS GETTING WORSE. WE DECIDED AT THIS TIME TO RETURN AND LAND IMMEDIATELY. WE DECLARED AN EMER WITH ATC. WE HAD DIFFICULTY COMMUNICATING WITH ATC AS TO THE NATURE OF OUR EMER BUT THEY UNDERSTOOD WE NEEDED TO RETURN TO THE ARPT. AFTER COMPLETING THE CHKLIST THE SMOKE STARTED TO DISSIPATE. WE CONTACTED DISPATCH AND TOLD THEM WE WERE RETURNING TO ZZZZ. WE ELECTED NOT TO DUMP FUEL AND LANDED OVERWT. WE ASKED FOR AND RECEIVED LNDG DATA WHICH WE USED. WE LANDED AT 370000 LBS. ON FINAL APCH WE REALIZED THAT THERE WERE NO FIRE TRUCKS SO WE ASKED TWR TO SEND THE FIRE EQUIP. WE LANDED WITH 30 DEG FLAPS AND MAX AUTOBRAKES. CLRED THE RWY AND STOPPED THE AIRPLANE AND CALLED TO HAVE IT TOWED. THE BRAKES ON THE R SIDE OVERHEATED AND THE BRAKE TEMP INDICATOR ON THE R SIDE INDICATED BTWN 6 AND 9. THE MECH HOOKED UP AND TOLD US THAT THERE HAD BEEN A FIRE ON THE R WHEELS AND THAT IT HAD BEEN EXTINGUISHED WITH WATER. WE ELECTED TO KEEP THE PAX ON THE AIRPLANE AND NOT EVAC. WE COORDINATED FOR AIRSTAIRS AND BUSES AND DEPLANED FOR PAX. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER HAD NOT GOTTEN A FINAL STATUS REPORT ON THE CAUSE OF THIS EVENT. HOWEVER; THE INITIAL INDICATION WAS THAT ENG OR APU OIL HAD GOTTEN INTO AN AIR CONDITIONING PACK; SMOKING; AND FILLING THE CABIN WITH SMOKE. THERE WAS NO ACTUAL FIRE AND THE ENGINES WERE REMOVED AND EXAMINED AT THE REQUEST OF THE FOREIGN GOVERNMENT INVOLVED.