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NASA-LLIS-0062
Lessons Learned - LRU Platform Hoist and Tube Assembly; Platform Hoist Tube Assembly "UP" Limit Switch Bypass
Year: 1992
Abstract: Description of Driving Event:
Three sections of a telescoping tube assembly at Pad B rotating service structure (RSS) fell while being extended to incorporate a planned modification (MOD). The MOD intended to eliminate binding that had been experienced during testing and verification. The falling tubes impacted and severely damaged the RSS and orbital maneuvering system pod covers. The contributing factor to this failure is that the fillet welds on tube "D" provided an outward ramp effect that caused excessive wear on the keepers and the eventual bowing of tube "C" which allowed less surface contact area between the welded stops and the keepers.
Three sections of a telescoping tube assembly at Pad B rotating service structure (RSS) fell while being extended to incorporate a planned modification (MOD). The MOD intended to eliminate binding that had been experienced during testing and verification. The falling tubes impacted and severely damaged the RSS and orbital maneuvering system pod covers. The contributing factor to this failure is that the fillet welds on tube "D" provided an outward ramp effect that caused excessive wear on the keepers and the eventual bowing of tube "C" which allowed less surface contact area between the welded stops and the keepers.
Subject: Facilities
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:18:58Z | |
| date available | 2017-09-04T16:18:58Z | |
| date copyright | 03/05/1992 | |
| date issued | 1992 | |
| identifier other | TGYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/82419 | |
| description abstract | Description of Driving Event: Three sections of a telescoping tube assembly at Pad B rotating service structure (RSS) fell while being extended to incorporate a planned modification (MOD). The MOD intended to eliminate binding that had been experienced during testing and verification. The falling tubes impacted and severely damaged the RSS and orbital maneuvering system pod covers. The contributing factor to this failure is that the fillet welds on tube "D" provided an outward ramp effect that caused excessive wear on the keepers and the eventual bowing of tube "C" which allowed less surface contact area between the welded stops and the keepers. | |
| language | English | |
| title | NASA-LLIS-0062 | num |
| title | Lessons Learned - LRU Platform Hoist and Tube Assembly; Platform Hoist Tube Assembly "UP" Limit Switch Bypass | 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 | Lifting Devices | |
| subject keywords | Packaging Handling Storage | |
| subject keywords | Parts Materials & Processes |