As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FILLED WITH SMOKE AS WE PARKED AT THE GATE. STOPPED AFTER SHUTTING R PACK DOWN SMELLED LIKE SULFUR / TURNED ON PACK FOR T/S AND FOUND IT TO FLAG B1 CODE 211943. PACK TEMPERATURE ROSE TO 100 DEGREES C QUICKLY AND AN OVER TEMP CONDITION OCCURRED AUTOMATICALLY SHUTTING DOWN R/H PACK. REMOVED R/H ACM AND INSTALLED REPLACEMENT ACM AND PDTS IAW CRJ900 AMM 21-51-08-400-801-A01. OPS CHECKED AND LEAKED GOOD AT THIS TIME