Good to examine past issues, in particular maintenance that often is not done considering initial design.
Software Maintenance Mistake Center of Major FAA Computer Meltdown ABC News, Sam Sweeney; Jon Haworth; Kevin Shalvey, January 11, 2023; et al.
A senior official at the U.S. Federal Aviation Administration (FAA) blamed a software maintenance error for a computer breakdown this past week that grounded domestic flights. FAA officials said earlier the affected Notice To all Air Missions (NOTAM) system sends notifications to pilots of flight hazards and real-time restrictions. The senior official said the breakdown occurred when an engineer unwittingly "replaced one file with another," triggering a series of cascading information technology failures because an updated NOTAM system that lacked redundancies was not in place. The FAA emphasized that a cyberattack was not indicated, while Transportation Secretary Pete Buttigieg said a full investigation is required to prevent future mistakes. ... '
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