As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT THROUGH 7000 FT WITH APU OFF, HAD A DIRTY SOCKS ODOR. ODOR WENT AWAY WITH BOTH PACKS OFF. PERFORMED TSM 05-50-00-810-831-A AND RAN ENGINES IAW AMM 71-00-00, NO ODOR NOTICED. OPERATED EACH ENGINE WITH OPPOSITE PACK AND EACH PACK SEPARATE WAS OFF. ENGINE BLEED VALVES OFF ON OPPOSITE ENGINE. NO ODOR NOTICED