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NASA-LLIS-0009
Lessons Learned - Lubricant Particles Clogging Spacecraft System Filters
Year: 1991
Abstract: Description of Driving Event:
Low flow rates were observed in the shuttle orbiter freon coolant loops when the temperatures in the radiator panels dropped below minus 60 degrees Farenheit during a mission. An investigation of the problem revealed that the system filters were clogged with teflon particles. The origin of the particles was traced to the krytox fluoropolymer thread lubricant grease used during loop assembly. Corrective actions were taken to remove, clean, and replace the system filters, several valves, a flow proportioning module, and a pump assembly.
Low flow rates were observed in the shuttle orbiter freon coolant loops when the temperatures in the radiator panels dropped below minus 60 degrees Farenheit during a mission. An investigation of the problem revealed that the system filters were clogged with teflon particles. The origin of the particles was traced to the krytox fluoropolymer thread lubricant grease used during loop assembly. Corrective actions were taken to remove, clean, and replace the system filters, several valves, a flow proportioning module, and a pump assembly.
Subject: Flight Equipment
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:14:34Z | |
| date available | 2017-09-04T17:14:34Z | |
| date copyright | 06/14/1991 | |
| date issued | 1991 | |
| identifier other | ZAYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/137993 | |
| description abstract | Description of Driving Event: Low flow rates were observed in the shuttle orbiter freon coolant loops when the temperatures in the radiator panels dropped below minus 60 degrees Farenheit during a mission. An investigation of the problem revealed that the system filters were clogged with teflon particles. The origin of the particles was traced to the krytox fluoropolymer thread lubricant grease used during loop assembly. Corrective actions were taken to remove, clean, and replace the system filters, several valves, a flow proportioning module, and a pump assembly. | |
| language | English | |
| title | NASA-LLIS-0009 | num |
| title | Lessons Learned - Lubricant Particles Clogging Spacecraft System Filters | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1991 | |
| contenttype | fulltext | |
| subject keywords | Flight Equipment | |
| subject keywords | Launch Vehicle | |
| subject keywords | Parts Materials & Processes |