What was found
CREW REPORTED A DIRTY SOCKS SMELL IN COCKPIT DURING DESCENT ALL THE WAY TO LANDING. MORE NOTICEABLE AT LOWER POWER SETTINGS. FIRST NOTICED DESCENDING THROUGH 15,000. NO SMELL IN PAX CABIN. RAN LT RT ENG & APU. APPLIED ALL BLEED SOURCES TO BOTH PACKS. UNABLE TO CONFIRM ODOR. ACFT WAS FERRIED WHERE MX ACCOMPLISHED JOB CARD 26L00021004, DECONTAMINATION OF ENVIRONMENTAL CONTROL SYS ENGS & APU. R&R OZONE FILTERS IAW 21-51-41-000-001 & 21-51-41-400-001. OK FOR SERVICE.