As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT ON DESCENT INTO MCO PASSING 5,000 TURNED PACK 1 OFF FUME DISSAPATED-REF TSM 05-50-00-810-831-A. APU VERIFIED NO LEAKS. RAN ENGINE BLEED WITH PACK 1. FAINT SMELL. RAN ENGINE WITH PACK 2 NO SMELL AT ALL. IDENTIFIED PACK 1 AS THE ISSUE. CORRECTIVE ACTION ON THE NEXT ITEM 3330325-2