What was found
THE FLIGHT CREW REPORTEDAT THE GATE PREPARING FOR DEPARTURE, A VENT EXTRACT FAULT ECAM WARNING FOLLOWED BY LOUD VIBRATION AND SMOKE ODOR. INVESTIGATION BY MAINTENANCE TECHS DISCOVERED CIRCUIT BREAKER 2HQ , AVIONICS EXTRACT FAN, TRIPPED ON THE 123VU PANEL AS WELL AS RESIDUAL ELECTRICAL ODOR IN THE AVIONICS COMPARTMENT AND FLIGHT DECK. TECHS ACCOMPLISHED TSM 24-00-00-810-823A WITH NO FURTHER DEFECTS NOTED. THE AVIONICS EXTRACT FAN WAS PLACED ON MEL 21-26-12-2 AND THE AIRCRAFT WAS RETURNED TO SERVICE WITH NO FURTHER ISSUES ON SUBSEQUENT FLIGHTS.