What was found
DURING NR 1 ENGINE START THE FLIGHT/TAXI SWITCH POPPED TO THE FLIGHT POSTION, FOLLOWED BY A DC BUS FAULT AND SMOKE COMING FROM THE FLIGHT TAXI SWITCH. REPLACED THE FLIGHT TAXI SWITCH.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING NR 1 ENGINE START THE FLIGHT/TAXI SWITCH POPPED TO THE FLIGHT POSTION, FOLLOWED BY A DC BUS FAULT AND SMOKE COMING FROM THE FLIGHT TAXI SWITCH. REPLACED THE FLIGHT TAXI SWITCH.