As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FUMES SMELLING LIKE DIRTY SOCKS PRESENT ON THE FLIGHT DECK DESCENDING THROUGH 17000 FEET FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE FOUND THE LEFT HAND PACK WAS CONTAMINATED AND ACCOMPLISHED A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014 WITH NO SMELLS NOTED.