As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C SETTING AT GATE PRIOR TO BOARDING CREW SMELLED A BURNING ODOR. MAINTENANCE DISCOVERED BURNED WIRES ON THE FUEL CONTACTORS. FLIGHT WAS COVERED BY A/C 186. MAINTENANCE REMOVED AND REPLACED THE FUEL PUMP CONTACTORS 2A AND 1B IAW EMB 145 AMM 24-60-01 AND OPS CHECK GOOD. A/C RELEASED BACK TO SERVICE.