As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN COCKPIT DURING APPROACH, PASSING 4500 FT. NOT DETECTED IN CABIN. APU NOT RUNNIG, SMELLED LIKE DIRTY SOCKS. PERFORMED A NR 1 & 2 ENGINES IDK RUN IAW AMM 71-00-00. COMPLIED WITH INFORMATION NOTICE 2017-T015 A SECTION B TABLE 1. PERFORMED PACK DECONATMINATION. UPGRADED AND REPLACED RECIRCULATION FILTERS. ACFT IS OK FOR SERVICE.