As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL ON DESCENT PACK 2 ISOLITATED-PERFORMED IDENTIFICATION OF CAUSE OF CABIN ODOR IAW TSM 05-50-00-810-831-A. NO ODOR NOTED AT THIS TIME. A/C OK FOR CONTINUED SERVICE DESCRIPTION OF ODOR/FUMES: PERISTENT (LEVEL B) MUSTY DRY SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK AND FWD CABIN. NO VISBILE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.