As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ELECTRICAL BURNING ODOR IN THE FLIGHT DECK, ON ARRIVAL AT AC GPU WAS PLUGGED IN WITH BATTERY SWITCH OFF. REMOVED LT DCPC AND INSPECTED FOR DAMAGE TO THE BACK AND FACE OF BOARD. CLEANED AND REASSEMBLED IAW CMM 24-63-10. REINSTALLED THE LT DCPC IAW AMM 24-62-01. NO FURTHER ODOR NOTICED