April 11
Technicians replaced the controller from a faulty hydraulic power unit that prompted the halt of the launch of the Hubble Space Telescope on April 10. ("Repairs on Shuttle May Be Easier Than First Thought -- NASA," The Huntsville Times, April 12, 1990)
April 11
Royce E. Mitchell, Manager of the Space Shuttle Redesigned Solid Rocket Motor Project at the Marshall Center, was appointed Manager of NASA's Advanced Solid Rocket Motor (ASRM) Project Office. In addition, Lowell K. Zoller, who had served as manager of the ASRM contract negotiation phase of the program since July 1989, was reassigned as Assistant to the Director, Institutional and Program Support Directorate. (MSFC Management Announcement, April 4, 1990)
April 14
Technicians opened Discovery's payload bay doors to remove the Hubble Space Telescope's batteries for recharging and to replace a faulty auxiliary power unit. ("NASA Removes Hubble's Batteries for Recharging," Huntsville Times, April 15, 1990)
April 20
U.S. Representative Tom Bevill toured the Space Station Freedom mockup at the Marshall Center as part of a visit to the Center. (Marshall Star, April 25, 1990)
April 22
Columbia was rolled out to the launch pad in preparation for Astro 1. ("Discovery's Astronauts Back for Try at Launch," Huntsville Times, April 23, 1990)
April 24
The Twenty-seventh Space Congress was held at Cocoa Beach, Florida, April 24-27. The theme for the congress was "90's - Decade of Opportunity. Several representatives from the Marshall Center attended and presented papers. (See MSFC History Office Microfiche #2127, "Notable MSFC Events During 1990," May 7, 1990)
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