As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA'S ALERTED US OF DIRTY SOCK ODOR, ROWS 10-17. ODOR WENT AWAY INITIALLY WITH SMOKE/FUMES CHECKLIST. MX HAS US RESTORE VENTILATION ABOUT 30 MIN LATER ODOR CAME BACK AND WE COMPLIED WITH FUMES CHECKLIST. DEBRIEFED FLIGHT CREW AND ENSURED THE LOG IS ACCURATE. REF MSI LOG 1683947 FOR CORRECTIVE ACTION. (LP: 8924151, AIRCRAFT WAS GROUNDED)