As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AQE/ ON DECENT @3000 COULD NOT ISOLATE TO WITCH PACK. CONTINUOUS AND DISCOMFORTABLE, DIRTY SOCKS SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQURIED.-PERFOMED TSM 05-50-00-810-831-A FOUND NO CAUSE OF ODOR ENGINE OK APU OK PACKS OK A/O OK FOR SVC MOC NOTIFIED FOLLOWED DECONTAMINATION PROCEDURES IAW AMM 21-00-00-615-02 LEVEL A A/C OK FOR SVC