As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OF THE AIRCRAFT. THE CREW REPORTED SMOKE IN THE CABIN. AIRCRAFT RETURNED TO THE LOADING POSITION. TROUBLESHOT AND IDENTIFIED FAILURE IN THE COMPONENT ELECTRONIC ATTITUDE INDICATOR ASSY (EADI). CAPTAIN SIDE EADI WAS REPLACED IAW AMM 34-22-03. TESTED GOOD.