As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. CABIN CREW & PAXS REPORT UNKNOWN SMOKE IN THE CABIN. ACCOMPLISHED TROUBLESHOOTING OF CABIN AIR QUALITY IAW JC 43L00021001. FOUND SOURCE OF THE CABIN ODOR TO BE THE ACM & REPLACED IT IAW AMM 21-51-05. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.