As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MUSTY ODOR FOLLOWED BY A CHEMICAL ODOR FROM AFT CABIN TO FRONT OF CABIN DURING DESCENT. SECURED THE NR 2 PACK AS A PRECAUTION. ODOR DID NOT DISSAPATE. ACCOMPLISHED RAM AIR PROCEDURE, ODOR DISSIPATED. CABIN CREW & PASSENGERS REPORTED THE ODOR. PERFORMED DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM IAW AMM 21-00-00-615-001-A. OPS CHECKED GOOD.