References 480% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
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.
- [1]90%thisdayinaviation.com/25-february-1965thisdayinaviation.com· Posted Oct 23, 2026· Starts Feb 25, 1965 ✓· 33% of score
This Day in Aviation: "At 11:26 a.m., Pacific Standard Time, the first Douglas DC-9 ... N9DC, took off from Long Beach Airport" on 25 February 1965 (PST, UTC-8).
- [2]72%McDonnell Douglas DC-9 - Wikipediaen.wikipedia.org· Added Oct 23, 2026· 33% of score
Series 10 seating, variants, production total and the slat-less wing.[1]
- [3]78%Douglas DC-9 Tail - Delta Flight Museumcontent.deltamuseum.org· Added Oct 23, 2026· 33% of score
Delta's account of the first DC-9 service and its Delta Prince delivery.[1]
- [4]70%McDonnell Douglas DC-9 Flies Into Retirementnpr.org· Published Jan 11, 2014· 0% of score
Closing context: Delta flew the last scheduled DC-9 flight on 6 January 2014.[1]
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