As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL WITH AISELECTION OF BLEED AIR-DURING TROUBLE SHOOTING OF CABIN ODOR IT WAS FOUND THAT APU WAS OVERSERVICED WITH OIL DRAIN APU OIL TO PROPER OIL LEVEL AS PER AMM 49-90-00. ACCOMPLISHED DECONTAMINATION OF ENVIROMENT SYS AS PER AMM 29-00-00. AIRCRAFT OK TO CONITNUE OPS.