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UPDATE: Wednesday morning processing information notes a telecon will take place later today on the potential to move the rollaround up to Thursday, in order to avoid unacceptable weather conditions at the weekend. This has since been approved.<\/p>\n
Issues being worked on Endeavour currently hold no constraint to the launch date target of November 14, although one problem is being worked at Pad 39B \u2013 and needs to be resolved ahead of the rollaround.<\/p>\n
\u201cFailed Leak Check on Ground Cooling System Lines 20 and 21 during S0004 in VAB. At Pad B while looking for a leak it was discovered that the Freon lines were misconfigured,\u201d added processing information.<\/p>\n
\u201cWork is in progress to reconfigure Freon lines and change supply line filter. Currently it is a constraint for move to Pad A.\u201d<\/p>\n
This issue relates to a ground cooling unit, which perform the same function the orbiter\u2019s radiators on orbit \u2013 cooling the electronics and other heat producing hardware in the orbiter. This unit was connected to the orbiter with the inlet and outlet lines reversed.<\/p>\n
Given this unit is a GSE (Ground Support Equipment) freon heat exchanger loop, the system would still basically function if left as-is. However, the supply line filter \u2013 as are the incorrectly connected lines \u2013 would benefit from being correctly configured, thus engineering work is taking place.<\/p>\n
Once the orbiter is launched, the heat exchanger is removed from the loop and thus would not cause an in-flight problem. During launch and landing heat rejection is also accomplished by the Flash Evaporator System (FES).<\/p>\n
![\"\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2008\/10\/n1b1.jpg\")
Meanwhile, work on the fillerbar that was damaged during a leak on Endeavour\u2019s F5R thruster is not expected to take more than a day or so, and will likely be carried out once the STS-126 stack has taken up occupancy on 39A.<\/p>\n
All the affected TPS (Thermal Protection System) \u2013 which related to around 16 tiles on Endeavour\u2019s nose \u2013 have been cleaned and deemed to be undamaged by the \u201cooze\u201d that leaked from the thruster.<\/p>\n
Also under discussion is the potential of removal and replacement work on the command receiver\/decoders for STS-126\u2019s SRBs (Solid Rocket Boosters). This relates to Range Safety requirements.<\/p>\n
\u201cLate last week in a discussion with the Range, the command receiver\/decoders were identified as going beyond 180 days since bench testing at launch time,\u201d added the latest Shuttle Stand-up\/Integration report on L2. \u201cThat is a goal established with the Range.<\/p>\n
\u201cThe Range basic requirements include full up test of equipment 180 days prior to launch. Twelve years ago, the Range requirement was tailored, and they allowed that as a goal. In discussions, the Range established a preference to make that a requirement again for NASA.<\/p>\n
\u201cWill meet with them to discuss this. If they do require it, we\u2019ll have to R&R the command receiver\/decoders from STS-126.\u201d<\/p>\n
Ahead of the rollaround of Endeavour, STS-126 underwent a two day SSP FRR (Space Shuttle Program Flight Readiness Review).<\/p>\n
No major issues are in need of discussion, with current pre-emption of topics previously discussed over the past few weeks \u2013 bar the addition of a debate surrounding a new crew survival radio.<\/p>\n
\u201cCompleting review of FRR charts on Special Topics this afternoon with Johnson Space Center (JSC),\u201d noted one department on the stand-up report. \u201cHas to do with potential for non-flight washers and LESS carrier panel assembly.<\/p>\n
\u201cCharts will show have evaluated three items for flight rationale: panel deflection and analysis show that will not be a problem, fastener integrity \u2013 completed analysis to show have positive margin, and panel retention \u2013 evaluated using a Monte Carlo approach to show potential for tolerance stackups to prevent engaging locking feature. Have confidence the panel will stay on vehicle.<\/p>\n
\u201cOn the new survival radio that are trying to fly on STS-126, there were three batteries (out of 30) that look like they discharged during testing. They were hot when they came out of testing. Are dissecting those batteries and sending out to labs to understand what happened during the test.\u201d<\/p>\n
\u201cHad Engineering Directorate pre-FRR last Friday, with no major issues,\u201d added the Chief Engineer. \u201cTalked much about the carrier panel and crew survival radio battery issue. Will coordinate with Orbiter, but will probably bring to FRR.\u201d<\/p>\n
The FRR concluded during Wednesday, with no major issues noted.<\/p>\n
L2 members<\/em><\/em>: All documentation \u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, now over 4000 gbs in size.<\/em><\/em><\/p>\n","protected":false},"excerpt":{"rendered":" The unique transfer of Endeavour and the STS-126 stack from Pad 39B to 39A has been moved forward to Thursday at 8am. Meanwhile, the main SSP FRR has concluded with no major issues reported. A key milestone for the move is due to take place over the next 24 hours, with the arrival of STS-126\u2019s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[1445,9219],"class_list":["post-41285","post","type-post","status-publish","format-standard","hentry","category-news","tag-endeavour","tag-sts-126"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41285"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=41285"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41285\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41285"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}