sesThe launch of Ariane Spaceflight number 203 was stopped at T minus 1 minute 47 seconds, the countdown clock went red and was then reset to 7 minutes.
The fault was a liquid hydrogen valve failure.
Following the anomaly detected on Friday July 1 during the last few minutes into the launch attempt VA203, Arianespace has decided to replace the valve of the EPC (the main cryogenic stage), which did not function nominally.

Flight 203 was to carry the Astra 1N and BSAT-3c/JCSAT-110R satellites. In order to carry out this operation, the Ariane 5 ECA launch vehicle will be rolled back into the Final Assembly Building (BAF). The valve’s replacement and the ensuing operations should require approximately 20 days.
The Astra 1N and BSAT-3c/JCSAT-110R satellite payloads are maintained in fully safe conditions.
Arianespace will announce a date for a new launch attempt shortly.

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By Expat