NASA today released its completed investigation into the November 2025 incident that severely damaged its Goldstone antenna in California when workers allowed the antenna to “over rotate” beyond its acceptable limits, putting it out of commission.

In its final report, the board found the mishap primarily stemmed from software weaknesses, human error, and an undetected failure in the antenna’s hydraulic limit system. Investigators determined an electrical issue at the antenna the previous day caused the control system to misreport the antenna’s rotation state, an issue that went unnoticed and triggered multiple limit-stops during the Juno track on Sept. 16. While working to identify the limit-stop problem, operators performed several troubleshooting steps that inadvertently bypassed software and hardware safeguards, which ultimately led to the over-rotation incident. After flooding in the antenna base was observed, operators attempted to stow the antenna as a safety precaution, however, because the system had already passed the rotation limits, this action drove the antenna further into over‑rotation, causing additional damage.

Additionally, the investigation found the antenna’s hydraulic limit system, its final mechanical safeguard, was inoperable on Sept. 16 after being damaged in an undocumented prior incident. The system also had not been adequately tested for an undetermined period of time.

Investigators also concluded workplace culture pressured operators to work as expeditiously as possible, often stretching beyond their usual roles, expertise, and training, to keep the antenna operating. The board states the cultural conditions observed at Goldstone were not present at the network’s other sites, where roles and responsibilities are followed more consistently. Other contributing factors outlined in the report include inadequate procedures, reliance on undocumented practices and tacit knowledge, and gaps in the antenna’s control logic. [emphasis mine]

You can read that report here [pdf], but be warned that large sections are redacted, apparently in an effort to protect the identities of those responsible.

Nonetheless, it is very clear from the highlighted text above that the management and work situation at Goldstone was a mess, and that the mishap was caused not by faulty engineering but by faulty work practices and bad management. Unfortunately, nowhere in the report is it said that there will be any management changes. This fact might have been redacted, but I suspect not. It is typical of government agencies like NASA after incidents like this to whitewash the investigation, concluding simply that “we should have done better and we now we will!”

The repairs will cost NASA about $4.6 million, and will likely not be completed until 2028.