August 23
Tests that began at the Marshall Center on August 23 demonstrated that the liquid hydrogen leak that caused the postponement of STS-38 was not emanating from the External Tank (ET) Flange connection as originally believed. STS-38's 17-inch liquid hydrogen feedline, including the suspect ET flange, and the ET-to-Orbiter disconnect half of the umbilical had been removed from the Space Shuttle and shipped to MSFC's Technology Test Bed facility. (Martin Marietta Manned Space Systems, Mission Success Bulletin, August 31, 1990)
August 24
The vacuum chamber for the X-ray Calibration Facility arrived at MSFC by barge. (MSFC Observatory Projects Office, Draft Chronology of Events for 1990)
August 24
Shipment of the Marshall-managed Tethered Satellite System deployer from its manufacturer in Colorado to Kennedy Space Center began. Development and testing of the deployer were completed by Martin Marietta Astronautics Group in Denver. (MSFC Space Systems Office inputs for Draft Chronology of MSFC Events for 1990)
August 25
The transition of the Hubble Space Telescope Project from the Marsrall Center to Goddard Space Flight Center began. (MSFC Observatory Projects Office, Draft Chronology of Events for 1990)
August 28
The Ulysses spacecraft was transferred to the launch pad at Kennedy Space Center and stored in the rotating service structure's payload changeout room to await Discovery's arrival at the pad. (Johnson Space Center, Space News Roundup, September 7, 1990)
August 29
NASA cancelled the launch of Columbia scheduled for August 31 because of a failed electronic part on one of the four telescopes in the Space Shuttle cargo bay. ("Electronic Failure Causes Launch be Scrubbed, Huntsville News, August 31, 1990)
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