As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L PACK AUTOFAIL CAUTION MSG ACCOMPANIED BY L PACK FAULT STATUS MSG AND SMOKE IN CABIN. FOUND LH PACK TO SMOKE DEFERRED COCKPIT TEMP CONTROL SYS. REMOVED AND REPLACED LH ACM IAW CRJ 900 AMM 21-51-08-000/400-801. OPS CHECK GOOD. LEAK CHECK GOOD