As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AIRCRAFT EXPERIENCED SMOKE IN THE COCKPIT. THE AIRCRAFT RETURNED TO DSM. *S/D* THE PACK TEMPERATURE BECAME VERY HIGH. FOUND RAM AIR INLETS PACKED WITH ICE. CLEANED ICE FROM INLETS AND ACCOMPLISHED A HIGH POWER RUN. OPERATION CHECK NORMAL.