As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A REPORTED BURNING ODOR IN CABIN ESPECIALLY IN AFT SECTION. COMPLIED WITH QRH PROCEDURE AND ODOR DISSIPATED WHEN UTILITY BUSSES TURNED OFF. TROUBLESHOT AND FOUND RIGHT RECIRCULATION FAN BAD. REMOVED AND REPLACED THE FAN, FILTER, AND AIR CHECK VALVE IAW AMM 21-25. OPS CHECKED NORMAL.