As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT PASSING THROUGH 4000FT FAINT FUME OF DIRTY SOCK SMELL IN COCKPT. FA REPORTED OVERPOWERING ODOR IN CABIN. IAW COM PROCEDURE SHUTOFF NR 1 PACK AND CLOSED CROSSBLEED AND ODOR DISSIPATED.. PERFORMED IDENTIFICATION OF CABIN ODOR IAW TSM 05-50-00-810-831-A FOUND THE NR 1 PACK TO BE THE SOURCE OF CONTAMINATION