As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT WAS GROUNDED AS A RESULT OF AN SDR REPORTABLE EVENT DUE TO DIRTY SOCK SMELL ON APPROACH. FOUND RECIRCULATION FILTERS CONTAMINATED. SMELL NOTED DURING REMOVAL. REMOVED AND REPLACED RE-CIRCULATION FILTERS IAW AMM 21-21-41-400-001-A. PERFORMED LEVEL "A" DECONTAMINATION OF ECS. NO ODORS NOTED DURING OR AFTER. A/C OK FOR SERVICE. AMM 21-00-00-615-802-A/END/