As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED A DIRTY SOCK ODOR AFTER APU BLEED TRANSFER. PERFORMED A DECONTAMINATION OF THE ECS IAW AMM 21-00-00. FOUND NO TRACES OF OIL LEAKAGE IN APU, PACK DUCKS ,OR ENGINE DEOILER. FOUND RECIRCULATION FILTERS IN UNSATISFACTORY CONDITION. R & R THE FILTER IAW AMM 21-21-41. ACFT OK FOR SERVICE.