As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA REPORTED DIRTY SOCKS SMELL DURING DESCENT. ENTIRE CABIN. STRONGER ON THE BACK OF AIRPLANE. TURN PACK 2 OFF AND THE SMELL DID NOT GO AWAY. -PERFORMED TSM 05-50-00-810-331-A IDENTIFICATION OF THE CASE OF CABIN ODORS OR SMOKE, WITH ENGINE RUN UP APU RUN UP WITH LEFT PACK AND THEN RIGHT PACK. BOTH PACKS VERIFY CABIN BY ODORS, OIL SMELL OR SMOKE. DON'T DUPLICATED SMELL IS NORMAL.