As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, SMELL OF SMOKE AND LOW HUMMING SOUND NOTED. TURNED OFF PACK 1 AND CONDITION CEASED. FOUND CMC MSG 21189. T/S SUSPECT PACK 1 ACM AT FAULT. DEFERRAL AS PER MEL 21-51-01-02. DUE TO PACK 1 INOP FWD CARGO REMAINS EMPTY PER MEL 26-16-01-02-01B.