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.
ATR's milestones page: "August 16, 1984 The ATR 42 makes its first flight. The aircraft takes off for its maiden test flight from Toulouse, France".
Launch of the ATR programme on 4 November 1981.[1]
Certification and first delivery of the ATR 42.[1]
Anniversary account of the first flight and certification.[1]
Development history and the first-flight photo series.[1]
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