As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT NOTED SMOKE WHERE CIRCUIT BREAKER PANEL & WINDSHIELD MEET. ODOR NOTICED DOES NOT SEEM TO BE OF ELECTRICAL IN NATURE. REMOVED CIRCUIT BREAKER PANEL & INSPECTED WIRING & BLEED AIR LINES IN THE VICINITY. NO DEFECTS OR SMOKE WAS OBSERVED DURING EXTENSIVE ENG GROUND RUNS. ACFT PERFORMED AN OPERATIONAL FLIGHT CHECK TO AID IN DETERMINING THE CAUSE OF SMOKE & FUMES, SMOKE WAS STILL PRESENT.