As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2133. AFTER START UP OBSERVED SMOKE COMING FROM FRONT LEFT SIDE OF NOSE CONE. SUSPECTED EXESS MOISTURE IN LEFT (CA SIDE) TOP PITOT PROBE THAT BURNED OFF WHEN PROBE HEAT WAS APPLIED. REMOVED FROM SERVICE. PERFORMED GVI OF NOSE AND SURROUNDING AREA. NO DEFECTS NOTED. HEATED PITOT PROBES. REF AMM PROBES OPERATED NORMAL NO DEFECTS NOTED. 30-31-00-880-801A. RETURNED TO SERVICE.