What was found
AIRCRAFT WAS GROUNDED: DURING APPROACH, MUSTY SOCK SMELL WAS COMING OUT OF THE VENTS ONTHE FLIGHT DECK AND IN THE CABIN. TURNED OFF CABIN FANS, TURN OFF BOTH PACKS AND OPEN THE AIR AND SMELL WENT AWAY. REF MIC 7354430. MAINTENANCE ACCOMPLISHED J/C 26L00021002, DETERMINED RESIDUAL PACK CONTAMINATION FROM PREVIOUS SOF TO BE CAUSE OF SOF. ACCOMPLISHED JOB CARD 26L00021014 ENHANCED DECONTAMINATION. NO ODORS NOTED AT THIS TIME.