What was found
ON DESCENT THRU 12,000 FT TO 9,000 FT, A DISTINCT METALLIC DIRTY SOCK ODOR IN COCKPIT. ODOR DISSIPATED AT 9,000 FT. THE YAW DAMPER LEAKING. R & R YELLOW SYS YAW DAMPER ACTUATOR IAW AMM 27-26-51. OPERATIONS & LEAK CHECKED GOOD. ALSO, R & R YELLOW RESERVOIR DRAIN VLV THAT WAS FOUND LEAKING IAW AMM 29-13-41, LEAK CHECKED GOOD. PRESS WASHED AFT HELLHOLE, UPPER & LOWER TAIL CONE, EXTERIOR APU WASH, APU INLET & APU. COMPLIED WITH JOB CARDS 26L00051001, 26L00021002 & 26L00021004.