As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT ON APPROACH AROUND 2300 FEET. DIRTY SOCK SMELL.-PER TSM 05-50-00-810-831-A DETERMINED ODOR TO BE LEVEL A AND THE MOST LIKELY CAUSE TO BE APU. PERFORMED LEVEL A INSPECTION OF APU IAW AMM 49-00-00. NO DEFECTS NOTED. ACCOMPLISHED LEVEL A DECONTAMINATION OF ECS IAW AMM 21-00-00-615-802-A. NO ODORS NOTED DURING OR AFTER PROCEDURE.