As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN DESCENT. PERFORMED OPS CHECK OF BLEED AIR SYS WITH APU IAW AMM 36-12-00. ISOLATED PACKS 1 AND 2 DURING OPERATION WITH NO DEFECTS NOTED. PERFORMED OPS CHECK OF BLEED AIR SYSTEM WITH ENGINES IAW AMM 36-11-00. ISOLATED PACKS 1 AND 2 OFF OF EACH ENGINE BLEED WITH NO DEFECTS NOTED. COULD NOT DUPLICATE FUMES AT THIS TIME