As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG SMELL OF BURNING OR BURNT INSULATION AND A SLIGHT HAZE OF SMOKE IN COCKPIT. BOTH THE LEFT AND RIGHT INSTRUMENT PANELS AND WIRING WERE INSPECTED FOR OBVIOUS DAMAGE. PERFORMED GROUND RUNS WITH ALL COCKPIT INSTRUMENTS ON AND COULD NOT DUPLICATE THE PROBLEM. THE AIRCRAFT RETURNED TO SERVICE WITHOUT FURTHER INCIDENT.