As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT, NOTED ELECTRICAL BURNING SMELL. RETURNED TO BOOTHVILLE. MAINTENANCE FOUND TRANSISTOR 8Q2 FOR INSTRUMENT LIGHTS HAD SHORTED AND CAUSED RESISTOR 8R12 TO BURN OUT. REPLACED TRANSISTOR 8Q2, RESISTOR 8R12 AND RHEOSTAT 8R5.