As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THROUGH APPROX. 11000 FEET THE FIRST OFFICER AND I SMELLED WHAT SEEMED TO BE A FUME / ODOR EVENT. THE SMELL WAS A MIX OF MILDEW,DIRTY SOCKS AND NAIL PLOISHER. WE FOLLOWED THE ELIMINATION OF ODOR / FUMES QRH CHECKLIST AND FTER SELECTING PACK 1 OFF IT DISAPPEARED.-T/S DONE IAW AMM 05-50-00-810-831-A, CONFIRMED PACK #1 AT FAULT, SEE LOG PAGE 3633495-1 FOR PACK 1 DEFFERRAL