As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6351 - IAD-SWF - DURING TAXI, EXPERIENCED A PROBLEM WHEN THE CAPTAINS VSI WENT BLANK. AIRCRAFT RETURNED TO THE GATE WHERE MAINTENANCE CONTROL WAS NOTIFIED. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT AND REMOVED AND REPLACED THE CAPTAINS VSI INDICATOR. ALL REQUIRED CHECKS WERE ACCOMPLISHED AND THE AIRCRAFT WAS RELEASED FOR SERVICE. (M)