As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CABIN CREW REPORTED A MUSTY FOUL ODOR IN THE MAIN CABIN DURING DESCENT AND ARRIVAL. MAINTENANCE ACCOMPLISHED THE SMOKE / ODOR / FUMES TROUBLESHOOTING FOR THE APU PER TASK CARD 26L00021002 ALONG WITH AN ENHANCED DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014. NO LEAKS OR ODORS WERE NOTED. MAINTENANCE SUSPECTED DE-ICING FLUID INJESTION.