As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE LEFT PACK PUT OUT A BURNING SMELL AND A SLIGHT HAZE FILLED THE CABIN. ABOUT THE SAME TIME RECEIVED A LEFT PACK TEMP STATUS MESSSAGE AND THE TEMP WAS DROPPING RAPIDLY. REPLACED LEFT AIR CYCLE MACHINE. OPERATIONAL CHECKS GOOD, S/N OFF: 01103.