As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA REPORTED THAT THEY SMELLED SWEATY SOCK ODOR. FOUND DEBRIS IN AFT OVERHEAD SUPPLY DUCT BY MUFFLER. CLEANED OUT AREA IAW AMM 21-23., R & R RECIRC FILTERS IAW AMM 21-25. R & R LT PACK STANDBY TEMP CONTROL VALVE IAW AMM 21-51. P-TRACK INFO SENT AND FOUND TO BE OK. (8784884) AIRCRAFT WAS GROUNDED.