As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT SMELL OF ELEC OR PLASTIC CHEMICAL BURNING COMING FROM THE SWITCH BREAKER PANEL. INSPECTED PILOT SWITCH & BREAKER AREA. NO DEFECTS NOTED AT THIS TIME. R & R AVIONICS MASTER SWITCH IAW MM CHAPTER 39-40-00. OPERATIONS CHECKED GOOD.