As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DESCENDING THROUGH 10,000 FEET, STRONG MUSTY, DIRTY SOCK FUMES FILLED THE CABIN. COMPLIED WITH SMOKE/FUMES QRH CHECKLIST AND FUMES LESSEND BUT DID NOT COMPLETELY STOP. MAINTINANCE FOUND IFE COOLING FAN AT FAULT AND REPLACED.