As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG SOCK SMELL ON DESCENT PACK 1 ISOLATED SMELL. DESCRIPTION OF ODOR/FUMES: PERSISTENT, MUSTY DRY AND DIRTY SOCKS SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-REF TSM 05-50-00-810-831-A FOUND PACK #1 CONTAMINATED SEE LOG PAGE 3294905-2 FOR MX PROCEDURES