As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB PILOT NOTICED AN ELECTRICAL BURNING SMELL AND SLIGHT SMOKE IN COCKPIT. AIRCRAFT RETURNED TO AIRPORT. SUBSEQUENT INVESTIGATION INTO THE ELECTRICAL SYSTEM REVEALED NO DISCREPANCIES. AIRCRAFT FLIGHT CHECKED OK AND SUBSEQUENT OPERATION OF 5.7 HOURS HAS REVEALED NO PROBLEMS.