FAA system outage causes thousands of flight delays and cancellations across the US The airline industry has slowly begun to resume service after a Federal Aviation Administration system outage caused thousands of flight delays and cancellations across the United States Wednesday. The FAA briefly halted all domestic flight departures across the United States Wednesday morning, lifting the ground stop around 9 a.m. ET after it restored a system that provides pilots with pre-flight safety notices. But airlines continued to delay or cancel flights because of ongoing congestion. By midday Wednesday, the FAA's website was still showing ground delays and ground stops at some airports. The Chicago Department of Aviation said ground stops at O'Hare and Midway had been lifted but "residual delays or cancellations" are likely. Major US carriers including United Airlines, Delta and American Airlines all said they had grounded flights in response to the situation. United and Delta have issued travel waivers in response to the outage. American Airlines also said its customers could rebook their flights Wednesday and Thursday without additional fees. FlightAware, which tracks delays and cancellations, showed more than 7,600 flights to, from and within the United States as being delayed as of 1:05 p.m. ET, and more than 1,100 flights canceled so far. Southwest, which canceled thousands of flights after Christmas following a systemwide meltdown, was hit hard, with more than 375 canceled flights. About 9% of Southwest flights are canceled and 47% of flights are delayed. The airline said mid-morning Wednesday that operations have resumed. "As a result of the FAA's outage, we anticipate some schedule adjustments will be made throughout the day," Southwest said in a statement, encouraging travelers to check their flight status online or via the airline's app. Southwest has also issued a waiver allowing travelers to change their flights. American Airlines was hit even harder by one measure: Including feeder airlines that use regional jets, American said it has canceled nearly 400 flights as of midday Wednesday. Cause of outage still unclear The affected system, Notice to Air Missions (NOTAM), sends alerts to pilots to let them know of conditions that could affect the safety of their flights. It is separate from the air traffic control system that keeps planes a safe distance from each other, but it's another critical tool for air safety. https://unsplash.com/@matskodhondtlk https://unsplash.com/@soderstro https://unsplash.com/@arewaaa https://unsplash.com/@adumkslankk https://unsplash.com/@markette https://unsplash.com/@slamdunkzh https://unsplash.com/@natchcimon https://unsplash.com/@nittayamete https://unsplash.com/@amananawa https://unsplash.com/@waezaaa https://unsplash.com/@furgersonlag https://unsplash.com/@avatar2th https://unsplash.com/@idellasidbe https://unsplash.com/@funnnyapppp https://unsplash.com/@buyketutmena https://issuu.com/oraapo https://www.onfeetnation.com/photo/albums/afwawfafw https://muckrack.com/fardonasarup-fardonasarup/bio https://www.justgiving.com/page/elwajirka-elwajirka-1673468377631 http://allabouturanch.com/photo/albums/faa-system-outage-causes-thousands-of-flight-delays-and https://beterhbo.ning.com/photo/albums/faa-system-outage-causes-thousands-of-flight-delays-and https://leyes.co/user/4934.htm https://vocus.cc/article/63bf1a98fd897800015d82c1 https://techplanet.today/post/faa-system-outage-causes-thousands-of-flight-delays-and-cancellations-across-the-us https://theamberpost.com/post/faa-system-outage-causes-thousands-of-flight-delays-and-cancellations-across-the-us http://dom-nam.ru/index.php/forum/stroitelnye-kompanii/17216-faa-system-outage-causes-thousands-of-flight-delay#33405 https://chopatti.com/forum/topic/faa-system-outage-causes-thousands-of-flight-delays-and-cancellations-across-the-us http://www.shadowville.com/board/general-discussions/faa-system-outage-causes-thousands#p578003 https://articlenetwork.site/faa-system-outage-causes-hundreds-of-flight-delays-and-cancellations-throughout-the-us/ https://stockhouse.com/companies/bullboard/t.sia/sienna-senior-living-inc?postid=35216584 https://www.bankier.pl/forum/temat_faa-system-outage-causes-thousands-of-flight-delays,12827247,1.html https://ok.ru/video/4638784227979 https://www.banditroom.site/faa-device-outage-reasons-hundreds-of-flight-delays-and-cancellations-throughout-the-united-states/ https://www.wadeszig.vip/faa-system-outage-causes-1000s-of-flight-delays-and-cancellations-throughout-the-us/ https://rextester.com/YYFHA18463 http://healingxchange.ning.com/photo/albums/faa-system-outage-causes-thousands-of-flight-delays-and http://zacriley.ning.com/photo/albums/faa-system-outage-causes-thousands-of-flight-delays-and https://backlinktool.io/p/7494hGguh3jh7r3IZCZ0.html https://paste.rs/A7v https://caribbeanfever.com/photo/albums/faa-system-outage-causes-thousands-of-flight-delays-and http://ben-kiki.org/ypaste/data/65115/index.html https://ideone.com/qh7wOT https://ide.geeksforgeeks.org/fb19948d-0b92-4974-bfe4-f8b9b887b774 https://jsitor.com/OZZefVrdyW https://yamcode.com/qmjg1zhqpo https://pastelink.net/skg1a0q3 https://bitbin.it/7f256ddH/ https://www.pastery.net/qmedjf/ https://paste.awesom.eu/arwoawa/0egb http://paste.jp/06a62920/ https://pasteio.com/xHbISNgGY1Ad https://paste.firnsy.com/paste/HOVTvlPUqQI https://dotnetfiddle.net/cIk6fi https://jsfiddle.net/rm20chfy/ http://pastebin.falz.net/2496137 https://justpaste.it/byls3 https://tech.io/snippet/LtdpEyk https://paste.toolforge.org/view/859bc361 https://paiza.io/projects/BzQebTkuBWtyUb-XOlWZcA There is no evidence yet that Wednesday's air travel technology meltdown resulted from a cyber attack, Transportation Secretary Pete Buttigieg said, but he also wouldn't rule it out. "There's been no direct evidence or indication of that but we are also not going rule that out until we have a clear and better understanding of what's taken place," Buttigieg said in an interview with CNN's Kate Bolduan. A 90-minute nationwide ground stop of flights across the United States Wednesday morning was implemented out of an "abundance of caution." Buttigieg said that there were "irregularities" overnight in the safety messages that were going out to pilots that reflected a larger issue. Buttigieg, who has been hard on airlines over their staffing and technology issues in the last year, said the Transportation Department and Federal Aviation Administration would "own" responsibility for their failures. "No, these kinds of disruptions should not happen and my primary interest now that we've gotten through the immediate disruptions of the morning is understanding exactly how this was possible and exactly what steps are needed to make sure it doesn't happen again," Buttigieg said. US President Joe Biden said Wednesday morning there was no immediate information on what had caused the outage -- the second US aviation crisis in a matter of weeks. There is "no evidence of foul play based on our discussions with DOT/FAA," a senior US official familiar with matter told CNN. Buttigieg said via Twitter Wednesday morning that he had ordered an "after-action process to determine root causes and recommend next steps." Calls came swiftly for aviation system upgrades. "Today's FAA catastrophic system failure is a clear sign that America's transportation network desperately needs significant upgrades," said Geoff Freeman, president and CEO of the U.S. Travel Association. "Americans deserve an end-to-end travel experience that is seamless and secure. And our nation's economy depends on a best-in-class air travel system." The Federal Aviation Administration is currently without a permanent leader, and President Biden's nominee for the role has faced criticism. International impacts International flights bound for the United States were continuing to take off from Amsterdam and Paris despite the situation. A Schiphol Airport spokesperson told CNN that "a workaround had been issued" and flights were still departing from Amsterdam. No flights have been canceled from Paris' Charles de Gaulle airport, but delays were expected, according to the airport's press office. Frankfurt Airport also told CNN it had not been impacted. A London Heathrow Airport spokesperson told CNN early Wednesday that they were "not aware of canceled flights and that flights to the US had left recently," however there were passenger reports of significant delays. Shabnam Amini told CNN that she and other travelers had been sitting on board Americans Airlines flight 51 to Dallas for almost three hours at Heathrow because of the FAA outage. She said they had been informed that there were delays but were still boarded onto the aircraft. Commercial airline pilots use NOTAMS for real-time information on flight hazards and restrictions. The FAA stipulates NOTAMS are not to be relied on as a sole source of information, and so some flights may be able to satisfy safety requirements by using other data. Wednesday's incident comes on the heels of another aviation crisis. A huge winter storm over the end-of-year holidays caused extensive disruption and helped trigger the Southwest Airlines meltdown that affected thousands of passengers. While Wednesday's flight cancellations at Southwest are a problem for its customers, it was nowhere near as bad as what it experienced from December 21 through December 29, when about 16,000 flights, or nearly half of its scheduled, had to be canceled due to lack of available staff. CNN's Barry Neild, Paul P. Murphy, Betsy Kline, Livvy Doherty, Chris Isidore, Sean Lyngaas, Betsy Klein, Marnie Hunter and Stephanie Halasz contributed to this story.