As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2864, THE CREW REPORTED AFTER STARTING APU & WAITING 3 MINUTES SELECTED PACK 1 & 2 ON THEY NOTICED A BURNING ODOR THROUGHOUT AIRCRAFT. FOUND COCKPIT TEMPERATURE CONTROL INOPERATIVE. REMOVED AND REPLACED THE COCKPIT AMBIENT TEMPERATURE SENSOR IAW EMB AMM 21-60-02. THE OPERATIONAL CHECK WAS GOOD