Nah, we'll rely on the backup.
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wrote on 20 Dec 2020, 13:25 last edited by
https://spacenews.com/nasa-to-skip-repair-of-orion-electronics-unit/
NASA will not repair a faulty electronics unit on the Orion spacecraft recently completed for the Artemis 1 mission after concluding there was sufficient redundancy in the overall system.
In a Dec. 17 statement, NASA said it had decided to “use as is” one of eight power and data units (PDU) on the Orion spacecraft, which provide communications between the spacecraft’s computers and other components. One of two redundant channels in one of two communications cards in that PDU is not working.
NASA announced the problem with the PDU Nov. 30, saying only that it was “troubleshooting the issue.” The problem was first reported by The Verge, which said that presentations by prime contractor Lockheed Martin warned it could take up to a year to replace the PDU because it is located in an adapter between the crew module and service module that is inaccessible now that the two modules are mated to each other.
That time estimate assumed that the crew module would be demated from the service module, the PDU repaired, and the two modules combined again and tested. An alternative option could complete repairs in just four months, but would require removing panels of the adapter to reach the PDU, something the hardware was not designed for.
NASA, in its statement about deciding not to replace the PDU, did not go into details about the repair options, but said that the risks of damaging the spacecraft during the PDU repair outweighed any loss of data should the unit completely malfunction.
If it's just data loss that's at risk, I understand the decision.
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https://spacenews.com/nasa-to-skip-repair-of-orion-electronics-unit/
NASA will not repair a faulty electronics unit on the Orion spacecraft recently completed for the Artemis 1 mission after concluding there was sufficient redundancy in the overall system.
In a Dec. 17 statement, NASA said it had decided to “use as is” one of eight power and data units (PDU) on the Orion spacecraft, which provide communications between the spacecraft’s computers and other components. One of two redundant channels in one of two communications cards in that PDU is not working.
NASA announced the problem with the PDU Nov. 30, saying only that it was “troubleshooting the issue.” The problem was first reported by The Verge, which said that presentations by prime contractor Lockheed Martin warned it could take up to a year to replace the PDU because it is located in an adapter between the crew module and service module that is inaccessible now that the two modules are mated to each other.
That time estimate assumed that the crew module would be demated from the service module, the PDU repaired, and the two modules combined again and tested. An alternative option could complete repairs in just four months, but would require removing panels of the adapter to reach the PDU, something the hardware was not designed for.
NASA, in its statement about deciding not to replace the PDU, did not go into details about the repair options, but said that the risks of damaging the spacecraft during the PDU repair outweighed any loss of data should the unit completely malfunction.
If it's just data loss that's at risk, I understand the decision.
wrote on 20 Dec 2020, 13:51 last edited by@george-k said in Nah, we'll rely on the backup.:
NASA, in its statement about deciding not to replace the PDU, did not go into details about the repair options, but said that the risks of damaging the spacecraft during the PDU repair outweighed any loss of data should the unit completely malfunction.
It sounds like a good decision, but that is surprising that the design has such an expensive maintenance option.
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wrote on 22 Dec 2020, 23:37 last edited by
NASA production values getting better
Link to video