Cape Canaveral, Fla. — Launch pad issues delayed flights to the International Space Station on Wednesday, replacing two NASA's stopped astronauts.
The new crew will need to reach the International Space Station before Butch Willmore and Suni Williams can return home nine months into orbit.
Concerns over a critical hydraulic system occurred within four hours of the evening lift-off when Falcon Rocket was planned from NASA's Kennedy Space Center.
When the countdown clock was engraved, the engineers evaluated the hydraulic pressure that one of the two arms was used to secure the rocket to the support structure. This structure must be tilted just before the lift-off.
The four astronauts, already tied to capsules, were waiting for the final decision. SpaceX was cancelled that day.
The company did not immediately announce a new launch date, but noted that the next attempt could be Thursday night.
Once at the space station, crews from the US, Japanese and Russian will replace Willmore and Williams, who have been there since June.
The two test pilots had to travel to the space station for a long-term stay after Boeing's new Starliner capsule encountered a major breakdown during transportation.
Starliner's debut crew light was supposed to last just a week, but NASA ordered the capsule to return empty and transferred Willmore and Williams to SpaceX for return legs.
