As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL COMING INTO THE COCKPIT FROM THE APU BLEED. ACCOMPLISHED TSM 05-50-00-810-831. FOR CABIN ODOR. RAN BOTH PACKS ON APU BLEED. ISOLATED PACKS NO SIGN OF CONTIMINATION INSPECTED PACKS AND APU AREAS NO SIGNOFF POSSIBLE CAUSE. A/C OK FOR SVC.