Northrop Grumman's Cygnus XL Successfully Docks with ISS After Engine Issue Delay
The Cygnus XL cargo spacecraft docked with the International Space Station a day later than planned due to a premature engine shutdown caused by a software setting.
Northrop Grumman's Cygnus XL cargo spacecraft successfully docked with the International Space Station (ISS) on Thursday, following a one-day delay caused by a premature engine shutdown. Astronauts aboard the ISS utilized the station's robotic arm to capture the capsule as it orbited over Africa.
The Cygnus XL, carrying approximately 11,000 pounds (5,000 kilograms) of supplies—including food, scientific experiments, and equipment for the station's systems—was initially scheduled to arrive on Wednesday. However, during its ascent, the spacecraft's main engine shut down earlier than planned. Engineers identified the issue as stemming from an overly conservative software setting.
This mission marks the inaugural flight of the larger Cygnus XL model. Northrop Grumman named the capsule the S.S. Willie McCool, honoring the pilot of the 2003 space shuttle Columbia mission. NASA maintains contracts with Northrop Grumman and SpaceX to ensure regular resupply missions to the ISS. Additionally, Russia continues to send supplies, and Japan is set to resume deliveries soon.