As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FLT 1901 - AFTER TAKEOFF MIA DURING CLIMB-OUT, AIR CYCLE MACHINE NR 2 FAILED AND PRODUCED SMOKE IN CABIN. AIRCRAFT RETURNED TO MIA AND LANDED WITHOUT INCIDENT. REPLACED NR 2 AIR CYCLE MACHINE, RIGHT PACK TURBINE BYPASS VALVE, SENSE LINE AND REPLACED COALESCER BAG. ACCOMPLISHED PACK BURNOUT PROCEDURE. SYSTEM GROUND CHECKED NORMAL OPERATION WITH NO SMOKE OR ODOR NOTED. (M)