References 585% CONFIDENCEOverall confidence: 85%How well the pin's source and references back up its dates.Weighted average of how firmly 5 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%
  boeing.mediaroom.com/1999-10-09-Wheels-Up-Boeing-767-400ER-Makes-Debut-Flight

  boeing.mediaroom.com· Posted Oct 23, 2026· Starts Oct 9, 1999 ✓· 50% of score

  Boeing: 'The airplane, identified as VQ001, taxied then lifted off the runway at 12:10 p.m.' (12:10 PDT = 19:10 UTC); FlightGlobal^[5] reports the 5h 5min flight began at Everett and ended at Boeing Field.

• [2]80%
  FAA Type Certificate Data Sheet A1NM

  web.archive.org· Added Oct 23, 2026· Starts Jul 20, 2000· 50% of score

  Lists the 767-400ER as approved on 20 July 2000.^[1]

• [3]85%
  Boeing 767-400ER Receives Certification Approval From FAA (Boeing)

  boeing.mediaroom.com· Published Jul 20, 2000· Starts Jul 20, 2000· 0% of score

  Says the airplane flew first on 9 October 1999 and that three aircraft logged 1,150 flight hours and 1,200 ground-test hours before FAA approval and 180-minute ETOPS on 20 July 2000.^[1]

• [4]85%
  Cockpit advance (Flight International, 2000)

  web.archive.org· Published Jul 18, 2000· Starts Oct 9, 1999· 0% of score

  Flight's pilot flew the first 767-400ER and found it "stable, with good natural damping", with vortillons added after certification showed a marginal dirty stall.^[1]

• [5]85%
  Maiden flight for first 767-400ER (Flight International, 1999)

  flightglobal.com· Published Oct 20, 1999· Starts Oct 9, 1999· 0% of score

  Says the 5h 5min flight began at Everett and ended at Boeing Field, flown by Buzz Nelson and John Cashman, opening a 6.5-month, 800-hour program for the 245-seat derivative.^[1]

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