As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK ODOR IN THE CABIN WITH APU BLEED ON. PREVIOS CREW REPORTED ODOR DURING DESCENT WITHOUT APU RUNNING.. PERFORMED ENGINE RUN WITH CREW IAW AMM 71-71-00. COULD NOT DUPLICATE THE SOURCE OF THE ODOR FROM THE NR 1 & 2 PACKS OR APU BLEED IAW AMM 21-21-00. ACFT OK FOR SERVICE.