A whopping 11,000 pounds of supplies and scientific instruments that were headed to the International Space Station are in limbo after a high-profile malfunction. Northrop Grumman’s Cygnus XL spacecraft encountered a serious problem with its main engine during its maiden voyage, NASA announced on Tuesday. The spacecraft, which is just over five feet longer than the aerospace giant’s Cygnus spacecraft, launched from the Cape Canaveral Space Force Station in Florida on Sunday evening atop a SpaceX Falcon 9 rocket. As Ars Technica points out, the Cygnus XL is filling in for a separate Cygnus spacecraft that was damaged while being transported from the company’s manufacturer in Italy. More on Cygnus: Cargo Spacecraft Breaks Down En Route to Space Station