As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT AS WE PASSED THROUGH SOME CLOUDS LEAD F/A CALLED TO COMPLAIN OF MUSTY SMELL . CYCLED PACK #2 OFF AND REQUERIED UPDATE MINOR CHANGE THEN DID THE SAME WITH PACK #1 F/O SMELT ALSO. PACK #1 ON SMELL RETURNED TURNED OFF -PERFORMED TSM 05-50-00-810-831A FOUND PACK #1 SOURSE OF THE ODOR SEE PAG 333053202 FOR CORRECTIVE ACTION