As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SMOKE OBSERVED IN COCKPIT WHEN MAGNETO SWITCH SELECTED TO LT MAG POSITION. INSPECTED A/C WIRE BUNDLES AND CONNECTIONS. REPLACED FAULTY SWITCH. UNSERVICEABLE SWITCH DISASSEMBLED AND STRONG ELECTRICAL BURNING SMELL WAS NOTED AS WELL AS SOME ELECTRICAL ARCING NOTED INSIDE THE SWITCH.