As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORT MUSTY OR DIRTY SOCK SMELL IN AFT CABINAND AFT GALLEY. FOUND HEPA FILTERS DIRTY AND CONTAMINATED. REMOVE AND REPLACED HEPA FILTERS. PER AMM 21-25-01. PERFOMRED PACK DECONTAMINATION PER AMM 21-00-01. NO FURTHER ODORS NOTED DURING APU BLEED AND ENGINE BLEED USE.