As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE COMING FROM AIR VENTS WHEN RUNNING LEFT PACK. WHEN L PACK IS ON OUTPUT TEMP INCREASES RAPIDLY AND PRODUCED L PACK AUTOFAIL MESSAGE. / DEFFERED LH PACK AIR CONDITIONING SYSTEM PER MEL 21-51-01-2 CAT- C. OPTION-2- PLACARD INSTALLED. OPTION 2-) / R/R LH ACM IAW CRJ 700 AMM 21-51-08-000/400-801-A01. OPS CHECK GOOD AT THIS TIME."