The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Happened as dated, per en.wikipedia.org: the first prototype was "unveiled in Toulouse, France on 18 January 2005, commencing its first flight on 27 April 2005."
Airbus’ own 20th-anniversary account confirms the 27 April 2005 maiden flight and adds that flight test aircraft MSN001 took off at exactly 10:30 am.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.