GAO-25-108162
A shutdown of the national airspace in 2023 due to the outage of an aging air traffic control (ATC) system prompted the Federal Aviation Administration (FAA) to conduct an operational risk assessment to evaluate the sustainability of all ATC systems. Of the 138 systems, 51 (37 percent) were deemed unsustainable by FAA and 54 (39 percent) were potentially unsustainable. Many unsustainable and potentially unsustainable systems have critical operational impacts on the safety and efficiency of the national airspace. In September 2024, GAO found several weaknesses in how FAA manages investments to modernize these systems. FAA’s progress has also been slow, taking years to establish cost, schedule, and performance baselines for investments that GAO selected for its review. As of May 2024, completion dates for planned investments for systems that GAO deemed especially concerning were at least 6 to 10 years away. Four such systems did not have associated investments.
A November 2023 GAO report found that since 2018, FAA had made mixed progress on its multi-decade effort to modernize air traffic management (i.e., the Next Generation Air Transportation System (NextGen)). Across four critical program areas GAO assessed (e.g., navigation and communications), FAA met some milestones for deploying systems but missed others, some by several years. The COVID-19 pandemic, which delayed system testing and other activities, contributed to those missed milestones. GAO found that closer adherence to five of nine program management leading practices, such as those related to life-cycle cost estimates and risk mitigation strategies, could better position FAA to manage the program and realize safety and efficiency benefits.
GAO’s 2023 and 2024 reports made recommendations to FAA to help address shortcomings in the agency’s management of NextGen and ATC system investments. For example, weaknesses exist in FAA’s risk mitigation approach. GAO recommended FAA develop a risk mitigation plan for NextGen and report to Congress on its risk mitigation efforts for all unsustainable and critical systems. Doing so would help FAA systematically examine risk mitigation options and increase transparency. FAA has fully addressed two GAO recommendations: conducting root cause analysis on programs that exceed baselines and managing investments in segments. However, critical risk mitigation recommendations and others …
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