{"id":41273,"date":"2008-11-04T23:53:27","date_gmt":"2008-11-04T15:53:27","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/sts-126-working-display-processor-issue-sts-125-de-stack-preps\/"},"modified":"2008-11-04T23:53:27","modified_gmt":"2008-11-04T15:53:27","slug":"sts-126-working-display-processor-issue-sts-125-de-stack-preps","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/sts-126-working-display-processor-issue-sts-125-de-stack-preps\/","title":{"rendered":"STS-126 working Display Processor issue \u2013 STS-125 de-stack preps"},"content":{"rendered":"

Engineers are working a connection issue with an Integrated Display Processor on Endeavour, which is currently a constraint to moving into the S0007 Launch Countdown.  Meanwhile, Atlantis will be de-stacked from ET-127, before being rolled back to her Orbiter Processing Facility (OPF) next week.<\/p>\n<\/p>\n

Processing at Pad 39A is proceeding to plan for the November 14 launch date, though the \u201cCRT2 MEDS 1553 bus error\u201d \u2013 which was observed during power-up last Friday \u2013 will need to be resolved before next week\u2019s launch countdown begins.<\/p>\n

\u201cOn the vehicle processing side, the payload bay doors were closed for flight last week,\u201d noted an \u201c8th Floor\u201d review of STS-126\u2019s processing on L2. \u201cOn Friday, during vehicle power up, CRT2 MEDS 1553 bus error was annunciated by IDP2. Initial troubleshooting was inconclusive. Further engineering evaluation will be required.\u201d<\/p>\n

This highly technical issue relates to the Integrated Display Processor 2\u2019s poor \u2013 or ratty \u2013 connection to its particular display with the MIL-STD-1553B databus. This could lead to the loss of the display during flight.<\/p>\n

\u201cNew IPR to DPS (Data Processing System) during vehicle power up last Friday,\u201d added processing information this week on L2. \u201cThe IPR was for CRT2 MEDS 1553 bus error annunciated by IDP2.<\/p>\n

\u201cThis was no constraint to continued power up operations. The constraint is to S0007 (Launch Countdown).\u201d<\/p>\n

Apart from this new problem, processing has been relatively issue-free \u2013 as the complex ballet of pre-S0007 operations are carried out on the shuttle.<\/p>\n

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\u201cS0044 Launch Countdown Phase Simulation was completed yesterday. Time Code Generator (TCG) countdown time test was successfully completed yesterday,\u201d noted Tuesday processing information. \u201cS1287 Aft closeouts for launch continue.\u201d<\/p>\n

\u201cS0007.100 Launch countdown preparations began yesterday. S1005\/1006 LOX\/LH2 Dew point and conditioning checks are scheduled for today. S5009 Ordnance installation and connections are scheduled to begin tomorrow.\u201d<\/p>\n

Meanwhile, Atlantis will be de-mated from ET-127 \u2013 on what is currently a flexible schedule \u2013 now the STS-125 mission has been delayed until at least May, 2009. She will be rolled back \u2013 on her wheels (as opposed to on the Orbiter Transport System) \u2013 early next week.<\/p>\n

ET-127 \u2013 which is currently undergoing repairs \u2013 will now be used by Discovery for February\u2019s STS-119 mission to the International Space Station (ISS).<\/p>\n

\u201cThe plan is to demate OV104\/Atlantis from the STS-125 stack and use that stack to support STS-119\/15A with OV103\/Discovery,\u201d added the 8th Floor overview on Monday. \u201cOrbiter demate is targeted for later this week. The STS-119\/15A mission is scheduled to launch NET February 12th.<\/p>\n

\u201cCall to stations for OV-104 Atlantis de-mate from the external tank (S0030) is currently scheduled for 1600hrs Friday 11\/7\/08. OV-104 will roll back to OPF Bay-1 on Sunday 11\/9\/08. The landing gear will be extended and the Orbiter will roll back on wheels. This will allow maintenance in Bay-1 to be completed by Saturday 11\/8\/08.\u201d<\/p>\n

However, Tuesday processing information points to the de-stack taking place next Monday, as engineers evaluate the most viable schedule of events for sending Atlantis back to her OPF.<\/p>\n

\u201cS0030 Orbiter\/ET de-mate operations are scheduled as follows: Orbiter\/ET de-mate pre-ops are scheduled to begin tomorrow and complete Friday. Orbiter Sling build-up is scheduled for Friday. Orbiter\/ET de-mate is scheduled to begin on Monday (11\/10).\u201d<\/p>\n

\"\"Engineers have started repairs on ET-127 \u2013 following three impacts by a steel rod that liberated from a weather protection sheet around the orbiter\u2019s FRCS (Forward Reaction Control System), ahead of rollback from Pad 39A.<\/p>\n

\u201cLH2 Tank Foam Damage: Removed loose foam. Red dye and sand complete. Kaman readings In-Work,\u201d added Tuesday processing information, with confirmation that no damage was observed on Atlantis herself.<\/p>\n

\u201cThe Impact Analysis Team was requested to run an impact analysis of the rod to the RCC panels on the wing leading edge similar to a launch day potential ice impact analysis,\u201d added a separate note.<\/p>\n

\u201cBased on the mass of the rod and the distance it would have fallen, no detectable damage is predicted. Surface defects would not be detectable by this analysis. Therefore, the RCC panels were visually inspected and no surface defects or damages were found.\u201d<\/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":"

Engineers are working a connection issue with an Integrated Display Processor on Endeavour, which is currently a constraint to moving into the S0007 Launch Countdown.  Meanwhile, Atlantis will be de-stacked from ET-127, before being rolled back to her Orbiter Processing Facility (OPF) next week. Processing at Pad 39A is proceeding to plan for the November […]<\/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":[9236,8290,9219],"class_list":["post-41273","post","type-post","status-publish","format-standard","hentry","category-news","tag-et-127","tag-sts-125","tag-sts-126"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41273"}],"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=41273"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41273\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}