As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1722 MBJ-MCO, ON TAXI OUT AFTER CRANKING NR 2 ENGINE HAS A SMELL OF SOMETHING BURNING THEN NOTICED RAPID INCREASE IN CABIN/COCKPIT TEMP. THEN REPORT FROM F/A SMOKE IN ROW 18 AND BACK. STOP AIRPLANE REF QRH THEN TURN OFF PACK 1 & 2 ALONG WITH RECIRCULATION FANS AND SMOKE STOPPED AT THAT POINT. PERFORMED FAULT ISOLATION FOR SMOKE IN CABIN IAW FIM 21-20-00-810-801-A FOUND NR 1 ACM AT FAULT. THE NR 1 ACM WAS REMOVED AND REPLACED IAW AMM 21-20-00 AND OPS CHECK GOOD.