As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXING INTO THE GATE, L PACK AUTO FAIL CAUTION MSG, FOLLOWED BY BURNING SMELL FWD CABIN SMOKE. L PACK FAULT STATUS MSG AFTER TURNING THE PACK OFF / FOUND LH ACM SEIZED, REPLACED LH PACK ACM IAW CRJ 900 AMM 21-51-08-400-801-A01. OPS CHECK AND LEAK CHECK GOOD.