This crew and mission was originaly manifasted to be STS-51A but due to the problems with the Shuttle schedule the mission was reassigned to STS-51D. The Astronauts who would fly the STS-51D mission were: Daniel C. Brandenstein,(mission Commander); John O. Creighton (pilot); John M. Fabian, Steven R. Nagel and Shannon W. Lucid all Mission Specialists; and Gregory Jarvis and Charles D. Walker both Payload Specialists. Jarvis represent Hughes Aircraft Company and and Walker, McDonnell Douglass Corporation.
STS-51D was scheduled to fly in March 1985. When the TDRS satellite, scheduled to be deployed from STS-51E, developed problems, the STS-51E mission was cancelled and STS-51D remanifested to include some elements from STS-51E. The 51E crew, along with Payload Specialist Charles Walker, became the new STS-51D crew. The original STS-51D crew, with new Payload Specialists, (Patrick Baudry, who came from STS-51E, and Prince Sultan, Al-Saud) became the new STS-51G crew. Greg Jarvis moved to STS-51L.
The STS-51D insignia illustrates the advances in aviation technology in the United States within a relatively short span of the twentieth century. The center scene is dominated by a golden eagle, flying steadfastly and determined into the future. The Shuttle flies in formation atop the Wright Flyer. The Flyer is reminiscent of America's first days of flight. The orbiter rides above the antique plane, to show that each advance in the world of technology is carried by the accomplishments that have preceded it. The surnames of the crewmembers for the Discovery's five-day mission appear near the outher edge of the circular insignia.