As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A ROUTINE INSPECTION , WHEN THE PITOT HEATER SWITCH WAS SELLECTED THE CIRCUIT BREAKER WOULD POP. INVESTIGATION REVEALED THAT THE FEMALE ELECTRICAL CONNECTER TO THE PITOT HEAD HAD FAILED CAUSING A DIRECT SHORT. THE FEMALE PIN CONNECTER WAS REPLACED WITH A NEW UNIT.