As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR OF SMOKE IN CABIN AND IN COCKPIT IN FLIGHT ON APPROACH TO LANDING, APU OFF. TRANSFERRED TO NRWC 507-ORD-02496. R & R RT ACM NR 2 IAW AMM 21-51-08. OPS CHECK AND LEAK CHECK GOOD. NO ABNORMAL ODOR NOTED. ALSO, GROUND RAN BOTH ENGINES IAW AMM 71-00-00. NO SMOKE OR ABNORMAL ODOR NOTED REF NRWC 507-ORD-02496.