As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT, PILOT REPORTED THAT CIRCUIT BREAKER (POPPED) OUT. HE RESET THE BREAKER AND SPARKS CAME OUT OF THE ITT GAUGE. THE MARK ON THE INSTRUMENT CASE INDICATE THAT A SHORT OCCURRED INSIDE AND GROUNDED TO THE INSTRUMENT PANEL, CAUSING THE SPARKS.