At Thursday 21 October 2021, the ground crew at rocketron discover a malfunction with one of the ne-2 engine on the booster 3. The malfunction leads to the delaying of the OT-1 mission. So the crew works from noon to midnight. We expected the launch will take place at Saturday 23 October 2021, but then The crew found the problem. One of the ne-2 have a valve that was destroyed after the first static fire, so then the crew replace the valve with the new one And the rocket is ready for the launch expected today.