As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, AN ODOR WAS NOTICED BY FA MID FLIGHT, MID CABIN. A CAMP FIRE ASH ODOR. SHUTOFF SUSPECTED LEFT RECIRCULATION . ODOR DIMINISHED IN 10 MINUTES. MAINTENANCE REPLACED RECIRCULATION FILTERS AMM 21-25, AND THE RECIRCULATION FAN. OPS CHECKED NORMAL IAW AMM 21-25.