What was found
RETURNED TO GATE FOR SMOKE IN THE COCKPIT. VENT EXTRACT FAULT OCCURRED SHORTLY AFTER ENG START & TAXI STARTED. REPLACED AVIONICS EXTRACT FAN.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURNED TO GATE FOR SMOKE IN THE COCKPIT. VENT EXTRACT FAULT OCCURRED SHORTLY AFTER ENG START & TAXI STARTED. REPLACED AVIONICS EXTRACT FAN.