As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG PROPANE/ROTTEN EGG SMELL IN AFT CABIN DESCENDING THRU 1 0000. PASSENGERS NOXIOUS. DEBRIEFED CREW AND CONFIRMED ODOR WAS AT AFT GALLEY AND LAST 2 ROWS. IT LAST APROX 10 MINS, THE ODOR WAS NO LONGER PRESENT BY THE TIME THE ARRIVED AT THE GATE. INSPECTED GALLEY EQUIPMENT AND LAVATORIES NO SMELL WAS PRESENT. INSPECTED AFT PIT AND ENGINES NO DEFECTS NOTED. REF TSM 05-50-00-810-831-A