As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 1805 -FUME- WHILE AT THE GATE, APU WAS ON LINE AND THE RAMP PULLED EXTERNAL POWER. THERE WAS A BURNING ELECTRICAL SMELL IN THE COCKPIT AND FORWARD GALLEY. SEVERAL CB'S TRIPPED IN THE COCKPIT. CORRECTIVE ACTION: INSPECTION OF WIRES/ TERMINAL LUGS OK. R/R K102 GROUND SERVICE TRANSFER RELAY. SYSTEM OPERATION IS NORMAL.