As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCKS SMELL REPORTED BY AFT FA -PERFORMED TSM FOR CABIN ODORS. REF 05-50-00-810-831-A OPERATED PACK 1/2 WITH APU BLEED NO ODOR NOTED. NO EXTERNAL OIL LEAKS. DUE TO RECENT HISTORY AND AFT CABIN ODOR ONLY REFER TO NEXT ITEM FOR PACK 2 MEL. FOR ISOLATION OF ECS.