As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED DIRTY SOCK SMELL ON DESCENT. PILOTS ON O2 AND EMERGENCY DECLARED. T/S PER MSI WORKCARDS. ISOLATED PNEUMATIC SYSTEM, RAN ENGINES USING P-TRAK. NO ABNORMAL ODORS PRESENT. REPLACED RECIRC FILTERS. NO ODORS. ACFT RTS. (LP# 8035472)