The Notice to Air Missions (NOTAM) system was completely offline Wednesday morning, grounding commercial flights across the US. Credit: Magdalena Petrova The Notice to Air Missions (NOTAM) system, a centralized database operated by the US Federal Aviation Administration (FAA) that provides key safety information for all air travel nationwide, was back online Wednesday morning after an outage that grounded flights across the country. NOTAM provides an automated, central source of critical flight data for aviators, noting information like closed runways at particular airports, equipment outages, and hazards along travel routes. The FAA’s first public notice of the outage was in a tweet sent at approximately 6:30 a.m. Eastern Standard Time, but it’s unclear at what point, overnight, that the system actually went down. As of 9 a.m. EST, the FAA said in a follow-up tweet, the system was fully restored. Flights already in the air at the time of the outage were deemed safe to land, but the outage snarled air travel across the country, as the FAA implemented a ground stop at all airports in response. Newark and Atlanta both began to resume departures even earlier, the FAA said, “due to air traffic congestion in those areas.” A spokesperson for Atlanta’s Hartsfield-Jackson International Airport, said that 13,000 passengers locally, and 43,000 nationwide, had been affected by the ground stop, according to the New York Times. An industry group, Airlines for America, warned that the ground stop would cause “significant operational delays” around the country, and the full impact of the NOTAM outage is still being assessed. Root causes of the outage are were still unclear shortly after flights resumed, though nothing, including a cyberattack, has yet been ruled out. US Transportation Secretary Pete Buttigieg’s latest statement said that, while the system has been restored, the search for the direct cause of the outage is still under investigation. As of 9:30 a.m. EST, data from FlightAware indicated that almost 4,600 flights in the US had been delayed, with another 832 cancelled. Flights from some airports were apparently still affected by local ground stops, including one at Chicago O’Hare, a critical air travel hub. United Airlines has pledged to waive change fees and rebookings for delayed and cancelled flights resulting from the outage. “The likely consequence of this is obviously a series of delays and cancellations across the US with perhaps some impact into longer-haul international flights,” said John Grant, chief analyst at OAG, a travel data analysis company. The outage comes amid a push to modernize the NOTAM system and transform it into a modern, fully automated framework, which has been under way since 2018. Related content feature Windows 11 Insider Previews: What’s in the latest build? Get the latest info on new preview builds of Windows 11 as they roll out to Windows Insiders. Now updated for Build 22635.3566 for the Beta Channel, released on April 26, 2024. By Preston Gralla Apr 26, 2024 251 mins Small and Medium Business Microsoft Windows 11 news Dropbox adds end-to-end encryption for team folders Dropbox this week unveiled a range of features, including security updates and key management, and the ability to co-edit Microsoft 365 documents from within the file-sharing app. By Matthew Finnegan Apr 26, 2024 3 mins Cloud Storage Collaboration Software Productivity Software feature Android versions: A living history from 1.0 to 15 Explore Android's ongoing evolution with this visual timeline of versions, starting B.C. (Before Cupcake) and going all the way to 2024's Android 15 (beta) release. By JR Raphael Apr 26, 2024 23 mins Small and Medium Business Smartphones Android news analysis The unspoken obnoxiousness of Google's Gemini improvements Google's Gemini chatbot is seeing all sorts of upgrades on Android this week, but those advancements reveal a darker underlying reality. By JR Raphael Apr 26, 2024 12 mins Google Assistant Google Android Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe