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7/17/2025, 3:46:57 AM
https://www.gao.gov/assets/gao-25-107591.pdf
>According to NASA officials, the program is encountering difficulties manufacturing both the EUS and core stage needed for Artemis IV. Program officials attributed these problems to several issues, including delays to earlier Artemis flights and delayed deliveries of parts and materials.
>The SLS program completed manufacturing of some flight hardware for Artemis IV, including the engines for both the core stage and the EUS. However, development of the facilities needed to test and qualify the integrated SLS Block 1B software and avionics remains a top program risk. Continued challenges could delay qualification testing, the design certification review, and the Artemis IV launch date.
>According to NASA officials, the program is encountering difficulties manufacturing both the EUS and core stage needed for Artemis IV. Program officials attributed these problems to several issues, including delays to earlier Artemis flights and delayed deliveries of parts and materials.
>The SLS program completed manufacturing of some flight hardware for Artemis IV, including the engines for both the core stage and the EUS. However, development of the facilities needed to test and qualify the integrated SLS Block 1B software and avionics remains a top program risk. Continued challenges could delay qualification testing, the design certification review, and the Artemis IV launch date.
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