A sensor reads hot during the count

Astronaut · Who you talk to: Engineering and the launch director

A battery temperature sensor on the launch abort system reads higher than expected, as happened on the Artemis II launch day.

What this case adds

Report it and hold your "Go" until engineering explains it.
Learn to tell an instrumentation issue from a real hardware problem before the poll.

Critical fails

Answering "Go" with an open problem in your system.
Waiving a mandatory launch constraint after the terminal count has started: it cannot be waived.
Holding more than 3 minutes between T-6 and T-1:30 and pressing on instead of recycling to T-10.
Not knowing the abort or emergency procedure for your role.

The full checklist of this mold, step by step with its official sources: Launch: go / no-go poll and final count.

Sources

NASA, Artemis II launch day updates https://www.nasa.gov/blogs/missions/2026/04/01/live-artemis-ii-launch-day-updates/

Making Synapses is not affiliated with, sponsored by or endorsed by NASA, the FAA or any space company. Artemis and the agencies are named and linked only to describe what this mold practices; real countdowns vary by mission.

Launch: go / no-go poll and final count