What was found
DIRTY SOCK ODOR DURING DESCENT, AROUND 5000 FEET, WITH ENGINE BLEEDS ON, NO APU, AND BOTH PACKS ON. PERFORMED TROUBLESHOOTING IAW TSM 05-50-00-810-831-A. PERFORMED AN ENGINE WASH IAW EMM 72-00-00-100-001-B00. R & R THE RT & LT OZONE FILTERS IAW AMM 21-51-41, OPS & LEAK CHECKED OK. R & R THE NR 1 AND 2 RECIRCULATION FILTERS IAW AMM 21-21-41. PERFORMED A BORESCOPE OF THE ENGINE NO OIL PUDDLING NOTED.