As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA AND PASSENGERS SMELLED BURING RUBBER IN CABIN ROW 6. MAINTENANCE RAN BOTH ENGINE HIGH AND LOW PSI BLEED WITH FULL AIR HOT AND COLD NO SMELLS NOTED SUSPECT LARGE A/C LANDING IN FRONT OF THIS CREATING RUBBER ODOR FROM TIRES WHICH THEN WERE INDUCED INTO AIR SYSTEM. NO FAULTS WITH ENGINE OR A/C SYSTEM OF ACM.