Table 1-61:  FAA-Cited Causes of Departure and En route Delays (After pushing back from the gate),,,,,,,,,,,,,,,,
,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999, 2000, 2001,b 2002
Operations delayed (thousands),356,338,394,393,298,281,276,248,237,272,245,306,374,450,348,286
Cause (percent),,,,,,,,,,,,,,,,
Weather,67,70,57,56,65,65,72,75,72,74,68,74,69,69,72,72
Airport terminal volume,11,9,29,35,27,27,22,19,18,18,22,15,12,14,12,14
Air Route Traffic Control Center volume,13,12,8,2,a,a,a,a,a,a,a,a,a,a,a,a
Closed runways / taxiways,4,5,3,3,3,3,3,2,3,3,3,3,5,6,5,4
National Airspace System equipment,4,3,2,1,2,2,2,2,3,2,3,2,2,2,2,1
Other,1,1,1,4,3,3,2,2,4,2,4,6,13,9,10,9
KEY:  ARTCC = Air Route Traffic Control Center; FAA = Federal Aviation Administration.,,,,,,,,,,,,,,,,
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a Delays due to ARTCC volume are included in delays due to terminal volume from 1991.,,,,,,,,,,,,,,,,
b Data are preliminary and subject to change.,,,,,,,,,,,,,,,,
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NOTE,,,,,,,,,,,,,,,,
Numbers may not add to totals due to roundings.,,,,,,,,,,,,,
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SOURCES,,,,,,,,,,,,,
"1987-97: U.S. Department of Transportation, Federal Aviation Administration, Aviation Capacity Enhancement Plan (Washington, DC: Annual issues). ",,,,,,,,,,,,,
"1998-2000: U.S. Department of Transportation, Federal Aviation Administration, Internet site http://www.faa.gov/apa/Delays/atDelays.htm as of Aug. 8, 2002. ",,,,,,,,,,,,,
"2001-02: Ibid., Internet site http://www2.faa.gov/index.cfm/apa/1319 as of July 21, 2003.",,,,,,,,,,,,,
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