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NASA-LLIS-0043
Lessons Learned - Clamping Procedures
Year: 1991
Abstract: Description of Driving Event:
A mishap occurred when technicians did not follow the sequence of events specified in the PR disposition for assembly of the thruster and fixture. The T-shaped mounting fixture was secured with only one C-clamp to an access platform's kick plate that had vinyl tape on both sides. The C-clamp was improperly used to prevent rotation and the vinyl tape acted as a lubricant between the clamped surfaces. These conditions allowed the offset weight of the mounting fixture/thruster assembly to overcome the clamping force and rotate about the single C-clamp and fall.
A mishap occurred when technicians did not follow the sequence of events specified in the PR disposition for assembly of the thruster and fixture. The T-shaped mounting fixture was secured with only one C-clamp to an access platform's kick plate that had vinyl tape on both sides. The C-clamp was improperly used to prevent rotation and the vinyl tape acted as a lubricant between the clamped surfaces. These conditions allowed the offset weight of the mounting fixture/thruster assembly to overcome the clamping force and rotate about the single C-clamp and fall.
Subject: Hardware
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:57:09Z | |
| date available | 2017-09-04T17:57:09Z | |
| date copyright | 33577 | |
| date issued | 1991 | |
| identifier other | FNYCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/180206 | |
| description abstract | Description of Driving Event: A mishap occurred when technicians did not follow the sequence of events specified in the PR disposition for assembly of the thruster and fixture. The T-shaped mounting fixture was secured with only one C-clamp to an access platform's kick plate that had vinyl tape on both sides. The C-clamp was improperly used to prevent rotation and the vinyl tape acted as a lubricant between the clamped surfaces. These conditions allowed the offset weight of the mounting fixture/thruster assembly to overcome the clamping force and rotate about the single C-clamp and fall. | |
| language | English | |
| title | NASA-LLIS-0043 | num |
| title | Lessons Learned - Clamping Procedures | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1991 | |
| contenttype | fulltext | |
| subject keywords | Hardware | |
| subject keywords | Industrial Operations | |
| subject keywords | Parts Materials & Processes |