As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AVIONIC CIRCUIT BREAKER/SWITCH FAILED IN FLIGHT CAUSING COMPLETE AVIONIC FAILURE CREW UTILIZED EMERGENCY AVIONIC BUS SWITCH AND LANDED WITHOUT INCIDENT. SEVERAL SUCH FAILURES RECORDED RECENTLY. THIS SWITCH HAS A HIGH UTILIZATION FACTOR.(K)