As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: STRONG DIRTY SOCKS; MUSTY ODOR ON FLUGHT DECK. LESSENING WITH PACK 1 OFF. MAINTENANCE REPLACED THE APU AIR OIL SEPERATOR AND THE APU VENT TUBE *AALA202608145149* - MAINTENANCE ACCOMPLISHED A DECONBTAMINATION OF THE ENVIRONEMTAL CONTRO, SYSTEM WITH NO FURHTER ODORS NOTED.