What was found
ODOR/FUMES, WET SOCK SMELL ON GROUND USING APU BLEED AIR. ONCE ENGINE BLEEDS ON, SMELL DISSIPATED. DURING DESCENT SMELL RETURNED AT 11,000 AND LASTED UNTIL PARKING. NO GO ODI CHECKLIST ATA 2172 SMOKE AND FUMES PRESENT C/W GENERATOR, APU, OFF 33-2423-9-0001 04718 ON 33-2423-9-0001 04505.