As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED STRONG ELECTRICAL SMELL FROM LEFT SIDEWALL ELECTRIC SWITCH PANEL WITH ALL ANTI-ICE PROTECTION ON. INVESTIGATION REVEALED PITOT HEAT SWITCH HAD ARCED AND BURNED INTERNALLY. TOTAL TIME ON SWITCH 3,109.7 HOURS SINCE INSTALLED.