As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AMF 1088 - DURING FLIGHT, JUST BEFORE LANDING, PILOT NOTED SMOKE IN THE COCKPIT. THE CONTROL AIR FAN SOUNDED LIKE IT WAS FULL OF MARBLES THEN IT STOPPED AND THERE WAS NO MORE SMOKE. LAN MAINTENANCE REMOVED AND REPLACED CABIN TEMP CONTROL. OPS CHECK GOOD.