As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING BELOW 9000 COCKPIT CREW EXPERIENCED DIRTY SOCK SMELL. AFTER COMPLETING SUPPLEMENTARY PROCEDURES SMELL WAS ISOLATED AFTER TURNING OFF ENG 1 PACK-ACCOMPLISHED TSM 05-50-00-810-831-A, PERFORM APU PRE CONDITION AND RAN PACK # 2 NO SMELLS NOTED AT THIS TIME PER AMM 12-33-21.