As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A SMELLED ODOR COMING FROM AFT CABIN DESCRIBED AS POSSIBLY POPCORN, BURNING RUBBER, OF BURNED COFFEE. POSSIBLY COMING FROM HIGHER IN THE CABIN PERFORMED TROUBLESHOOTING IAW TSM 05-50-00-810-831A. IDENTIFIED THE MOST PROBABLE CAUSE OF THE ODOR TO BE COMING FROM THE AFT GALLEY COFFEEMAKER WITH DRIED COFFEE RESIDUE ON THE HOT PLATE. CLEAN ENTIRE AREA AND PERFORMED OPS TEST OF THE AFT GALLEY COFFEEMAKER.