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NASA-LLIS-0111
Lessons Learned - LH2 Quick Disconnects (QD)
Year: 1992
Abstract: Description of Driving Event:
Quick disconnects, utilized for providing gasses to the space shuttle main engine drying/purge lines and the main propulsion system LH2 prepressurization system are identical and can be crossconnected in the OPF. The MPS heated GN2 purge panel provides heated or unheated GN2 at 645 +/- 65 psig for engine drying. Should GN2 645 +/- 65 psig be introduced to the GH2 prepressurization system, flight hardware damage could occur. This condition may or may not be visible on the firing room pressure gages depending upon the status of orbiter power.
Quick disconnects, utilized for providing gasses to the space shuttle main engine drying/purge lines and the main propulsion system LH2 prepressurization system are identical and can be crossconnected in the OPF. The MPS heated GN2 purge panel provides heated or unheated GN2 at 645 +/- 65 psig for engine drying. Should GN2 645 +/- 65 psig be introduced to the GH2 prepressurization system, flight hardware damage could occur. This condition may or may not be visible on the firing room pressure gages depending upon the status of orbiter power.
Subject: Facilities
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:04:44Z | |
| date available | 2017-09-04T16:04:44Z | |
| date copyright | 08/27/1992 | |
| date issued | 1992 | |
| identifier other | RTYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/67949 | |
| description abstract | Description of Driving Event: Quick disconnects, utilized for providing gasses to the space shuttle main engine drying/purge lines and the main propulsion system LH2 prepressurization system are identical and can be crossconnected in the OPF. The MPS heated GN2 purge panel provides heated or unheated GN2 at 645 +/- 65 psig for engine drying. Should GN2 645 +/- 65 psig be introduced to the GH2 prepressurization system, flight hardware damage could occur. This condition may or may not be visible on the firing room pressure gages depending upon the status of orbiter power. | |
| language | English | |
| title | NASA-LLIS-0111 | num |
| title | Lessons Learned - LH2 Quick Disconnects (QD) | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | Facilities | |
| subject keywords | Ground Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Human Factors | |
| subject keywords | Launch Process | |
| subject keywords | Launch Vehicle |