As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT DESCENDING THROUGH 4000 FEET DIRTY SOCKS SMELL. AFT FA REPORTED STRONGEST SMELL COMING FROM ROWS 14 AND BACK. ACCOMPLISHED TSM 05-50-810-831 FOR CABIN ODOR IDENTIFICATION USED AEROTRACER FOUND NO CONTAMINATION OR ODORS PERFORMED ENGINE 1 AND 2 RUNS, IAW 71-00-00 ISOLATED ALL BLEED SOURCES. NO ODOR DUPLICATION IN CABIN OR COCKPIT. A/C OK FOR SERVICE.