What was found
3R DOOR REST AREA SMOKE SMELL IN FLIGHT. LAVATORIES CHECKED OUT NOTHING. CURTAIN WAS DRAWN AROUND CREW REST SEATS. INTERVIEWED FLIGHT CREW DIRECTLY RESPONSIBLE FOR PI-REP. TWO FLIGHT ATTENDANTS REPORTED THE ODOR OF BURNING CARDBOARD WITHIN THE CONFINES OF THE 3R DOOR REST AREA, INSIDE THE CURTAIN. NO PAX IDENTIFIED ANY SMELL. NO OIL SMELL WAS EVER NOTED. COMPLIED WITH JC 33L00021001. ACFT CABIN ODOR REPORT FILED ALSO.