As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3222 - DURING TAXI AT LNK, THE AIRCRAFT FILLED WITH SMOKE EMANATING FROM THE LEFT BLEED SOURCE. THE LEFT AIR CONDITIONING SYSTEM WAS DEFERRED AND THE AIRCRAFT PROCEEDED TO MSP. MAINTENANCE REPLACED THE LEFT COOLING TURBINE AND MASTER VALVE. THE SYSTEM PERFORMED SATISFACTORILY. (W)