Officials in the United States have determined that hackers were not responsible for the Federal Aviation Administration’s (FAA) nationwide ground stop on Friday. The FBI is currently investigating whether a recent software update may have triggered the system outage.
Investigation into FAA System Outage
The FAA called for a halt in flight departures on November 13 due to communication issues at air route traffic control centers. This order, which disrupted thousands of flights, was lifted after more than four hours. Although flights have resumed, officials anticipate continued delays in the coming days.
Markwayne Mullin, the Homeland Security Secretary, addressed the media at the White House, confirming that the incident did not appear to be a cyberattack but rather a mechanical failure. Mullin noted the absence of evidence suggesting a cyber threat, stating, “there’s no chatter, we haven’t seen any footprints.” However, he did not completely dismiss the possibility of future findings.
Potential Causes Under Investigation
Several agencies, including the NSA, the Department of Defense, and CISA, are collaborating in the ongoing investigation, as Mullin indicated. According to a Bloomberg report, the FBI does not suspect a cyberattack or criminal activity, focusing instead on a software update as a possible cause.
Transportation Secretary Sean Duffy attributed the issue to outdated equipment. He explained that an influx of data overwhelmed the FAA’s network switches and routers, leading to inconsistent data output and necessitating a system shutdown.
Technical Challenges and System Updates
The ground stop was described as a precautionary measure by officials. Mullin suggested that the integration of new patches and equipment might have overwhelmed the existing system infrastructure. CBS News reported that the outage followed an update to the private communications network that supports air traffic control, managed by L3Harris. The network rebooted, then crashed, after the update.
Officials clarified that this incident was unrelated to a previous Microsoft outage earlier in the week and confirmed that the FAA’s newly installed AI systems were not involved. As of now, no definitive root cause has been announced.
In a prior nationwide ground stop in January 2023, a contractor inadvertently deleted critical files, causing system failures without any evidence of cyberattacks. The aviation sector continues to be cautious, given past cyber threats impacting the industry.
