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NASA-LLIS-0087
Lessons Learned - Payload Retention Latch Assembly (PRLA)
Year: 1992
Abstract: Description of Driving Event:
OMRSD S073A.90 thru .230 requires verification of voltages, phasing, and talkbacks to the orbiter. Present talkback verification method for the payload retention latch assembly (PRLA) involves extensive "hot" pin jumpering during testing using a 79K07833 breakout box and test leads. Improper jumper procedure by inserting a jumper at an incorrect location could result in inadvertent shorts or cross connection of live 120 volt and 28 volt electrical lines. This improper procedure could cause PRLA electrical system damage, orbiter interface damage and/or electrical shock/personnel injury.
OMRSD S073A.90 thru .230 requires verification of voltages, phasing, and talkbacks to the orbiter. Present talkback verification method for the payload retention latch assembly (PRLA) involves extensive "hot" pin jumpering during testing using a 79K07833 breakout box and test leads. Improper jumper procedure by inserting a jumper at an incorrect location could result in inadvertent shorts or cross connection of live 120 volt and 28 volt electrical lines. This improper procedure could cause PRLA electrical system damage, orbiter interface damage and/or electrical shock/personnel injury.
Subject: Energy
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:27:27Z | |
| date available | 2017-09-04T18:27:27Z | |
| date copyright | 06/16/1992 | |
| date issued | 1992 | |
| identifier other | INYCQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho146/handle/yse/209604 | |
| description abstract | Description of Driving Event: OMRSD S073A.90 thru .230 requires verification of voltages, phasing, and talkbacks to the orbiter. Present talkback verification method for the payload retention latch assembly (PRLA) involves extensive "hot" pin jumpering during testing using a 79K07833 breakout box and test leads. Improper jumper procedure by inserting a jumper at an incorrect location could result in inadvertent shorts or cross connection of live 120 volt and 28 volt electrical lines. This improper procedure could cause PRLA electrical system damage, orbiter interface damage and/or electrical shock/personnel injury. | |
| language | English | |
| title | NASA-LLIS-0087 | num |
| title | Lessons Learned - Payload Retention Latch Assembly (PRLA) | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | Energy | |
| subject keywords | Flight Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Hardware | |
| subject keywords | Launch Vehicle | |
| subject keywords | Payloads |