As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN CABIN AT FL 330 EMER DESCENT, GOT WORSE UPON DESCENT. PERFORMED GVI OF COOLING DUCTS & CLAMPS IN AFT EQUIP BAY. OPERATIONS TESTED A/C DISTRIBUTION SYS IAW AMM 21-51-00, NO FUMES OR OTHER DISCREPANCIES NOTED. FCF FOUND SATISFACTORY.