As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SOCKS SMELL DURING APPROACH. ISOLATING PACK 2 OFF HELPED DISSIPATE THE ODORS. TURNING PACK 2 OFF AND RUNNING PACK 1 HELPED DISSIPATE THE ODORS.-REF LP 2727034-2 FOR PACK BURNOUT.REPLACED RECIRCULATION FILTERS REF: AMM 21-21-41. PROBABLE SOURCE OF ODOR EVENT: APU (NO VISIBLE SIGNS OF OIL LEAK)