As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LEFT PACK OVERHEAT CAUTION MESSAGE ON THE GROUND AT CLT. UPON SELECTING THE LEFT PACK ON, A STRONG SMOKE ODOR FILLED THE COCKPIT. CREW TURNED OFF THE LEFT PACK. MAINTENANCE INSPECTED AND TROUBLESHOT THE AIRCRAFT AND FOUND BROKEN PINS ON THE COMPRESSOR OUTLET TEMPERATURE SWITCH. MAINTENANCE REMOVED AND REPLACED THE TEMPERATURE SWITCH AND CONNECTOR AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUAL. AIRCRAFT WAS RELEASED FOR SERVICE.