| 21. | _Late 2000 : Atta, Jarrah, and al-Shehhi begin training on jet aircraft simulators.
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| 22. | Regional airlines are increasingly opting for faster jet aircraft that ATR doesn't make.
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| 23. | Modern jet aircraft use supercritical airfoils which decrease wave drag significantly.
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| 24. | These problems were eventually solved as jet aircraft reached transonic and supersonic speeds.
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| 25. | It operates jet aircraft as a subsidiary of Delta Air Lines.
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| 26. | Clark holds an Airline Transport Pilot rating and currently flies light jet aircraft.
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| 27. | The jet aircraft were refueled in flight by aerial tankers.
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| 28. | Many newer aircraft, especially jet aircraft, have electric trim controls.
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| 29. | The airport has parking berths for three mid-sized jet aircraft.
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| 30. | In jet aircraft, all four tracks on the voice recorder are usually miked up.
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