An icy vent line may have caused Blue Origin to scrub debut launch of New Glenn
Briefly

Blue Origin scrubbed its first launch attempt of the New Glenn rocket due to technical issues, including a suspected ice clogging a vent line.
We're standing down on today's launch attempt to troubleshoot a vehicle subsystem issue that will take us beyond our launch window. We're reviewing opportunities for our next launch attempt.
Sources indicate the primary issue was likely ice obstructing a vent line, despite several attempts to clear it, leading to the launch being scrubbed.
In addition to the vent line issue, there may have been a problem with one auxiliary power unit, which is crucial for post-launch landings.
Read at Ars Technica
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