What was found
AFTER FUME EVENT FROM APPROX 22000 FT UNTIL LANDING DISAPUTED AFTER TOUCHDOWN . DESCRIPTION OF ODOR/FUMES: PERSISTENT, MUSTY DRY/DIRTY SOCKS/MOLDY SMELL. APPARENT CABIN SOURCE: UNKNOWN. MID CABIN, AFT CABIN, GALLEY, LAV, FWD CABIN, AND PAX SEATS. NO VISIBLE SMOKE OR HAZE. NO MEDICAL ATTENTION REQUIRED. REF W.O 367119 FOR CORRECTIVE ACTON, PERFOMED PACK BURNOUT IAW AMM 21-00-00-615-002 & 21-00-00-615-004. R & R RECIRCULATION FILTERS IAW AMM 21-21-41, NO DEFECTS NOTED OR SMELLS. NOTED ACFT OK FOR SERVICE.