As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK SMELL FROM TOP OF DESCENT DOWN TO ABOUT 10,000FT. -PERF. ENG. RUN IAW AMM 71-00-00 TO MATCH A/C CONFIG. UPON EVENT & COULD NOT DUPLICATE. PERF. VISUAL INSP. OF APU & NO DEFECT. NO DIRTY SMELL NOTED IN CABIN OR CKPT W/ ENG. OR APU BLEED.