The first flight of the Orion Multi-Purpose Crew Capsule will be no sooner than September 2014, the earliest a United Launch Alliance Delta 4 rocket will be available to launch the craft, NASAโ€™s human spaceflight chief told lawmakers in a Sept. 14 hearing.

โ€œWe have very solid plans to have the Orion capsule ready to support that 2014 test flight,โ€ William Gerstenmaier, NASA associate administrator for human exploration and operations, told the House Science, Space and Technology Committee. โ€œIt should be complete and ready to be turned over to the launch vehicle at the end of next year in December of 2013. What weโ€™re waiting on is the launch vehicle. The current launch vehicle availability is September of 2014.โ€

The Orion capsule to be used for that mission, know as Exploration Flight Test-1 (EFT-1), is currently being outfitted for flight at the Kennedy Space Center in Florida.

โ€œWeโ€™re working heat shield problems, weโ€™re working some avionics problems, weโ€™re working some parts problems, thatโ€™s all normal stuff we do normally,โ€ Gerstenmaier said. โ€œWeโ€™ve got schedule margin, we will have [Orion] ready to go fly at the end of 2013. All we need is a launch vehicle.โ€

NASA added $375 million to Lockheed Martin Space Systemsโ€™ $6.4 billion Orion prime contract to procure a Delta 4 launch for EFT-1 in 2011. During the mission, an unmanned Orion will be launched to orbit and then re-enter the atmosphere at about 32,000 kilometers per hour, nearly 80 percent of the velocity the capsule would reach in a return from lunar orbit. EFT-1 will test the craftโ€™s heat shield, avionics and other systems. A planned 2017 mission calls for using the congressionally mandated Space Launch System heavy-lift rocket to launch an unmanned Orion around the Moon. The mission would be repeated in 2021 with a crew on board for the first time.