As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE STARTING ENG 1 AFTER ENG 2 START ECAM GAVE VENT AVNCS SYST FAULT. STARTED TO TROUBLESHOOT AND WERE PULLING FCOM UP, FLIGHT ATTENDANTS IN AFT REPORTED SMELLING SMOKE. FIRE DEPARTMENT RESPONDED AND PASSENGERS WERE DE-PLANED VIA L1 AND L2 BY AIRSTAIRS.