What was found
ON FINAL APPROACH WHEN THE LANDING GEAR WAS EXTENDED THE FLIGHT ATTENDANT REPORTED SMELLING OF BURNING RUBBER NO FIRE OR SMOKE WAS OBSERVED IN THE CABIN .BY THE TIME WE HAD PARKED AT THE GATE, THE ODOR HAD DISSIPATED. THERE WAS NO FIRE SMOKE OBSERVED IN THE CABIN. AS PASSENGERS WERE DEPLANING TWO PASSENGERS FROM FIRST CLASS REPORTED TO THE FIRST OFFICER AND THE FA1 THAT A PASSENGER SITTING IN 2F WAS VAPING. THIS MAY HAVE BEEN THE REASON FOR THE SMELL OF SMOKE IN THE FRONT OF THE CABIN. ODOR SOURCE DETERMINED TO BE AN E-CIGARETTE. NO DISCREPANCIES FOUND