As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN FORWARD CABIN IN FLIGHT. RIGHT PACK OVERHEAT ON GROUND 99 + NO OVERWEIGHT LANDING. REMOVED AND REPLACED RIGHT TEMPERATURE CONTROL VALVE IAW CRJ 900 AMM 21-51-20. OPS CHECK FAIL. INFO NOTE: REFER TO LOG PAGE 2273914 ITEM 1 FOR DEFERRAL OF RIGHT PACK. A/C OK FOR SERVICE.