As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING BOARDING, SMOKE IN CABIN REPORTED. DEPLANED PASSENGERS. MAINTENANCE USED SL70021-028 FOR SMOKE AND/OR ABNORMAL ODOR IN PASSENGER CABIN AND/OR COCKPIT. ALL OK. ACFT RETURNED. ON NEXT FLIGHT THE RT PACK AUTO FAILED. FOUND RT ACM SEIZED , PROBABLE CAUSE OF THE SMOKE.