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 REPORTED THAT APPROXIMATELY 20 MINUNTES PRIOR TO LANDING, THERE WAS A SMELL OF DIRTY WET GYM SOCKS FROM ROW 23 BACK. MAINTENANCE REPLACED BOTH RECIRCULATION FAN AIR FILTERS AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO ODORS NOTED.