As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A'S REPORTED A "DIRTY SOCK" SMELL DURING DESCENT AND ON GROUND WITH APU AND PACKS RUNNING. ALSO REPORTED HEADACHES AND TIGHTNESS OF CHEST. STARTED AT TOP OF DESCENT AFTER POWER RETARDED WHILE IN MANAGED MODE. MX ACCOMPLISHED JOB CARDS 26L00021001 AND 26L00021002. ISOLATED THE APU AS SOURCE OF CABIN ODOR. ACCOMPLISHED ENVIRONMENTAL CONTROL SYS DECONTAMINATION OF APU IAW JOB CARD 26L00021004.