As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE SWITCH IS USED TO OPERATE THE PRIME SOLONOID AND BOOST PUMP FOR LEFT TO RIGHT ENGINE. THE SWITCH CASE BURNT THROUGH BY THE CENTRE CONTACT, WHICH HAS POWER ALL THE TIME. THE PILOT COULD SMELL BURING AND SEE SMOKE. THE SWITCH WAS NOT IN USE AT THE TIME AS ITS ONLY USED ON STARTUP.