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NASA-LLIS-0033
Lessons Learned - External Tank (ET) Vent System Withdrawal Weight Securing Device
Year: 1992
Abstract: Description of Driving Event:
The 1500-pound withdrawal weight for the ET LH2 vent line must be raised to access the withdrawal weight shock absorbers to perform maintenance. Personnel work directly beneath the withdrawal weight, held in place with a 125 psi air-operated winch and 5/8" diameter wire rope. The system design does not include a secondary means to secure the weight if the winch or wire rope fails, so workers shore the weights with pieces of wood or other available material that will brace the weights. The improperly used shoring devices could break under the load of the weights, causing injury to personnel.
The 1500-pound withdrawal weight for the ET LH2 vent line must be raised to access the withdrawal weight shock absorbers to perform maintenance. Personnel work directly beneath the withdrawal weight, held in place with a 125 psi air-operated winch and 5/8" diameter wire rope. The system design does not include a secondary means to secure the weight if the winch or wire rope fails, so workers shore the weights with pieces of wood or other available material that will brace the weights. The improperly used shoring devices could break under the load of the weights, causing injury to personnel.
Subject: Facilities
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:49:26Z | |
| date available | 2017-09-04T15:49:26Z | |
| date copyright | 09/17/1992 | |
| date issued | 1992 | |
| identifier other | QDYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/52398 | |
| description abstract | Description of Driving Event: The 1500-pound withdrawal weight for the ET LH2 vent line must be raised to access the withdrawal weight shock absorbers to perform maintenance. Personnel work directly beneath the withdrawal weight, held in place with a 125 psi air-operated winch and 5/8" diameter wire rope. The system design does not include a secondary means to secure the weight if the winch or wire rope fails, so workers shore the weights with pieces of wood or other available material that will brace the weights. The improperly used shoring devices could break under the load of the weights, causing injury to personnel. | |
| language | English | |
| title | NASA-LLIS-0033 | num |
| title | Lessons Learned - External Tank (ET) Vent System Withdrawal Weight Securing Device | 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 | Hardware | |
| subject keywords | Industrial Operations | |
| subject keywords | Launch Process | |
| subject keywords | Launch Vehicle | |
| subject keywords | Lifting Devices | |
| subject keywords | Safety & Mission Assurance |