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.
Airways: "6/01/1981: First Flight of the Prototype Short 360" and "it performed its maiden flight on June 1"; Wikipedia[2] infobox "First flight 1 June 1981"; Aerocorner[3]: "On June 1, 1981, the first prototype took to the skies".
First flight 1 June 1981, certification 3 September 1981, service in November 1982, specification box.[1]
Independent summary of prototype first flight, certification, first production flight and Suburban service entry.[1]
Describes the stretch from the 330 and service entry in November 1982; its first-flight date refers to the first production aircraft (August 1982).[1]
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. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.
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