As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3017 - EN ROUTE TO DTW, LEFT BLEED AIR FILLED THE AIRCRAFT WITH SMOKE. CREW VERIFIED LEFT ACM CAUSING SMOKE, TURNED ACM OFF. CREW DECLARED AND EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED LEFT COOLING TURBINE. ALL CHECKS GOOD ON GROUND RUN, NO SMOKE NOTED. (M)