As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THRU 12000 FT A/C STARTED SMELLING LIKE DIRTY SOCK S PHOTO UPDATE.. CREW INFORMED THAT SMELL DISSAPATED AFTER 5 MINUTES. UPDATED. PARTS. INFORMATION PLEASE REPLACE RECIRC FILTERS UNLOCKING FOR SIGN OFF REMOVED AND REPLACED BOTH LEFT AND RIGHT RECIRCULATION FILTERS REF AMM 21-25-01 RAN BOTH PACKS WITH APU AND ENGINE BLEEDS NO SMELL NOTED AT THIS TIME.