As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN SMOKE IN CABIN AFTER TAKEOFF, INTENSIFIED ON LANDING. VERIFIED WITH CREW THAT COLD AIR WAS BLOWING OUT AT 9A. TEMP CONTROLS FOUND TO BE SET AT MAXIMUM . INSP ACM FOUND DRAIN LOOSE. RECONNECTED WITH NO OTHER FAULTS. RAN ACM AT MAXIMUM WITH NO SMOKE OR FUMES NOTED