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NASA-LLIS-0295
Lessons Learned – Manufacturing Defects (Burrs) Becoming Loose Particles and Jamming Meshing Parts of Critical Components (Orbiter Hydraulic Pump)
Year: 1993
Abstract: Description of Driving Event:
During the shuttle STS-4 mission, an orbiter (OV-102) hydraulic pump failed. A post flight examination discovered an aluminum particle wedged into one of the high pressure pump gears. The probable source of the particle was determined to be in some drilled oil passages where evidence of burrs were found at the intersection of the holes. The pump manufacturer:
1. Implemented requirements for an inspection of all oil passages prior to assembly.
2. Added a flushing of the pump with clean hydraulic fluid following vibration testing and before continuing further acceptance testing.
3. Reviewed the pump cleaning process.
During the shuttle STS-4 mission, an orbiter (OV-102) hydraulic pump failed. A post flight examination discovered an aluminum particle wedged into one of the high pressure pump gears. The probable source of the particle was determined to be in some drilled oil passages where evidence of burrs were found at the intersection of the holes. The pump manufacturer:
1. Implemented requirements for an inspection of all oil passages prior to assembly.
2. Added a flushing of the pump with clean hydraulic fluid following vibration testing and before continuing further acceptance testing.
3. Reviewed the pump cleaning process.
Subject: Hardware
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:42:56Z | |
| date available | 2017-09-04T16:42:56Z | |
| date copyright | 07/29/1993 | |
| date issued | 1993 | |
| identifier other | VSZCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/106210 | |
| description abstract | Description of Driving Event: During the shuttle STS-4 mission, an orbiter (OV-102) hydraulic pump failed. A post flight examination discovered an aluminum particle wedged into one of the high pressure pump gears. The probable source of the particle was determined to be in some drilled oil passages where evidence of burrs were found at the intersection of the holes. The pump manufacturer: 1. Implemented requirements for an inspection of all oil passages prior to assembly. 2. Added a flushing of the pump with clean hydraulic fluid following vibration testing and before continuing further acceptance testing. 3. Reviewed the pump cleaning process. | |
| language | English | |
| title | NASA-LLIS-0295 | num |
| title | Lessons Learned – Manufacturing Defects (Burrs) Becoming Loose Particles and Jamming Meshing Parts of Critical Components (Orbiter Hydraulic Pump) | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1993 | |
| contenttype | fulltext | |
| subject keywords | Hardware | |
| subject keywords | Industrial Operations | |
| subject keywords | Parts Materials & Processes |