What was found
AIR TURN BACK, AFTER TOWER REPORTED HEAVY SMOKE OUT OF THE RIGHT ENGINE. DECLARED EMERGENCY AND RETURNED TO LAND. THE ENGINE INSTRUMENTS APPEARED NORMAL. NORMAL LANDING AT 284000 LBS (NOT OVERWEIGHT. OBSERVED ON LANDING NO SMOKE NOTED. ON TAXI IN TO GATE, NO SMOKE. VISUAL INSPECTION OF THE ENGINE EXTERIOR NO OIL LEAKS FOUND. TAIL PIPE IS TOTALLY DRY. OPENED COWLS AND FOUND NO LEAKS. MOCC RESEARCHED HISTORY AND NO SUSPECT PROBLEMS FOUND. CREW REPORTED NORMAL PARAMETERS AND A NORMAL LANDING. OK FOR SERVICE MM REF 72-00-40 OF FIM.