As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT FROM 12,000 FEET, CREW REPORTED A VERY STRONG DIRTY SOCK SMELL DEVELOPED. THE SMELL DISSIPATED AT ABOUT 3,000 FEET. COMPLIED WITH JOB CARDS 26L00021001 & 26L00021002. FOUND FUEL & OIL LEAKING FROM APU FUEL CONTROL UNIT TO BE SOURCE OF SMELL GOING TO CABIN & COCKPIT. R & R APU FUEL CONTROL UNIT O RING. COMPLIED WITH DECONTAMINATION OF ENVIRONMENTAL CONTROL SYS IAW JOB CARD 26L00021004. NO ODOR NOTED AT THIS TIME.