What was found
CREW REPORTED A DIRTY SOCKS ODOR, APU OFF, FUMES IN COCKPIT. THERE WAS A QUICK ODOR DURING DESCENT AND THEN A CONTINUOUS ODOR IN FWD CABIN AND COCKPIT DURING LAST 5,000 FT OF DESCENT AND APPROACH. FLIGHT CREW WENT ON OXYGEN. MX ACCOMPLISHED CABIN AIR QUALITY J/C 26L00021001. NO ODOR NOTED. ACCOMPLISHED SATISFACTORY TEST FLIGHT. ACFT OK FOR SERVICE.