{"id":41498,"date":"2008-01-22T17:53:06","date_gmt":"2008-01-22T09:53:06","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/sts-122-et-125-repairs-to-be-completed-on-friday\/"},"modified":"2008-01-22T17:53:06","modified_gmt":"2008-01-22T09:53:06","slug":"sts-122-et-125-repairs-to-be-completed-on-friday","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/sts-122-et-125-repairs-to-be-completed-on-friday\/","title":{"rendered":"STS-122: ET-125 repairs to be completed on Friday"},"content":{"rendered":"<p>Work is finalizing on External Tank ET-125, following a huge effort to bounce back from the ECO (Engine Cut Off) sensor anomalies that placed a temporary halt on the surge of ISS assembly.\n<\/p>\n<p>  The trimming of the newly applied foam around the LH2 Feed-through connector worksite is scheduled for Tuesday evening, with \u201ccloseouts\u201d targeted for completion this coming Friday.\n<\/p>\n<p><em><img fetchpriority=\"high\" decoding=\"async\" height=\"129\" alt=\"\" hspace=\"5\" src=\"http:\/\/forum.nasaspaceflight.com\/forums\/get-attachment.asp?action=view&amp;attachmentid=13910\" width=\"600\" align=\"left\" vspace=\"5\" border=\"0\/\"><\/em><\/p>\n<p><em>**The most comprehensive collection&nbsp;of&nbsp;Shuttle, Ares, Orion&nbsp;and ISS&nbsp;related presentations and mission documentation, plus expansive daily processing documentation and updates&nbsp;are&nbsp;<\/em><font color=\"#0000ff\"><em>available to download&nbsp;on L2<\/em><\/font><font color=\"#0000ff\"><em>&nbsp;**<\/em><\/font><\/p>\n<p><font color=\"#ff0000\"><em><img loading=\"lazy\" decoding=\"async\" height=\"139\" alt=\"\" hspace=\"5\" src=\"http:\/\/forum.nasaspaceflight.com\/forums\/get-attachment.asp?action=view&amp;attachmentid=31173\" width=\"212\" align=\"left\" vspace=\"5\" border=\"0\/\"><\/em><\/font><font color=\"#ff0000\"><em>STS-122 L2 Special NOW LIVE.&nbsp;<\/em><\/font><em><font color=\"#0033ff\">**Click&nbsp;here for sample of L2 menu and content**<\/font><\/em><\/p>\n<p><font color=\"#ff0000\" size=\"3\"><\/font><font size=\"2\"><em>**STS-122 Special:&nbsp;29 Flight Readiness Review (FRR) Presentations, Baselines and Mission Overviews. <font color=\"#0000ff\">**Click here for FRR&nbsp;overview articles: <\/font><\/em><font color=\"#0000ff\"><em>Article 1<\/em><\/font><\/font><font color=\"#0000ff\"><em> \u2013 <\/em><\/font><font color=\"#0000ff\"><em>Article 2<\/em><\/font><font color=\"#000000\"><\/font><font color=\"#0000ff\"><em>**<\/em><\/font>&nbsp;<em>Payload Presentations and vast amounts of live, uploaded images and presentations, movies (several)&nbsp;\u2013 already&nbsp;2400&nbsp;megabytes strong** <\/em><\/p>\n<p>**COMPLETE Section \u2013 over 1100mbs of presentations \u2013 on ECO\/Feedthrough Connector issues and troubleshooting, graphical and data based \u2013 expansive.**<\/p>\n<p><font color=\"#0000ff\" size=\"3\"><em>**LIVE updates on Atlantis&nbsp;STS-122 Troubleshooting Latest**<\/em><\/font><\/p>\n<p><font color=\"#0000ff\"><em>**LIVE updates on Discovery STS-124 Processing**<\/em><\/font><\/p>\n<p><em><u><\/u><\/em><\/p>\n<\/p>\n<p>Space tourism guides<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>SpaceX<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>SpaceX launch tickets<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>\n<p>     (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<\/p>\n<p>&nbsp;<em><font color=\"#0000ff\">**LIVE news updates on&nbsp;Endeavour&nbsp;STS-123 Processing**<\/font><\/em><\/p>\n<p>STS-122 ECO related news content: *Scrub 1* \u2013&nbsp;*MMT Debate*&nbsp;\u2013 *Scrub 2*&nbsp;\u2013 *Hale Memo*&nbsp;\u2013 *Forward Plan*&nbsp;\u2013 *Culprit Found*&nbsp;\u2013 *Tanking Test*&nbsp;\u2013 *Repair&nbsp;Options*&nbsp;\u2013 *MAF Plan* \u2013 *PRCB Debate*&nbsp;\u2013 *Plan Approved*&nbsp;\u2013 *Repair Schedule*&nbsp;\u2013 *Launch Date*&nbsp;\u2013 *New Issue*&nbsp;\u2013 *Hale Rallying Call*&nbsp;\u2013 *PRCB Launch Dates*&nbsp;\u2013 *New Connector Installed*&nbsp;\u2013 *Positive Test Results*&nbsp;\u2013 *Manifest Impacts*&nbsp;\u2013 *Optimism&nbsp;with forward plan*&nbsp;\u2013&nbsp;*Flight Rationale*<\/p>\n<p><em><u>STS-122 Troubleshooting Latest:<\/u><\/em><\/p>\n<p>The effort has involved engineers and technicians from the United Space Alliance, Lockheed Martin and others, added to several NASA centers being at the center of testing and analysis.<\/p>\n<p>A review of the documentation surrounding the changeout of the LH2 Feed-through connector with a modified connector \u2013 which has had its pins soldered to avoid the problem that is believed to have caused the ECO sensor anomalies \u2013 will start on Friday, during the Level 2 Delta Flight Readiness Review (FRR).<\/p>\n<p>Meanwhile, at the pad, work is coming to an end on the replacement work, which is now focusing on the finalization of foam TPS (Thermal Protection System) work over the J Box \u2013 which houses the connector assembly \u2013 and SRB (Solid Rocket Booster) PAL (Protuberance Air Loads) ramp. <\/p>\n<p>\u2018Sensor Feed-through connector update: The environmental enclosures were reinstalled Monday morning and thermal conditioning was re-established. Conathane application was completed around noon yesterday,\u2019 noted processing information on Tuesday morning. <\/p>\n<p>\u2018BX-265 spray was completed last night at about 00:30. Initial BX trimming is scheduled to pick up about noon today with final trim and sell later tonight, after 16 hour cure is complete. ECO closeouts and PAL ramp rework completion are still targeted for 1\/25 (Friday).\u2019<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"WIDTH: 205px; HEIGHT: 147px\" height=\"130\" alt=\"\" hspace=\"5\" src=\"http:\/\/forum.nasaspaceflight.com\/forums\/get-attachment.asp?action=view&amp;attachmentid=13815\" width=\"200\" align=\"left\" vspace=\"5\" border=\"0\/\"><font face=\"Verdana\" color=\"#0000ff\"><em>**Ride home through the fire,&nbsp;sparks&nbsp;and plasma of re-entry with Atlantis, Discovery and Endeavour.&nbsp;FIVE&nbsp;Stunning high quality&nbsp;2hr, 355-400mb Camcorder and HUD videos \u2013 from payload bay closure \u2013 through re-entry with an&nbsp;astronaut held camcorder video \u2013&nbsp;to post landing \u2013 several more videos showing landing from 90,000 ft also available and HUD videos from STA landings. Includes HALO II Re-entry video, and re-entry videos from Gemini and Apollo (converted from 8mm)**<\/em><\/font><\/p>\n<p>Atlantis herself is proving to be no problem in the push towards the start of S0007 Launch Countdown operations in two weeks time, with the only recent issue of note \u2013 a problem with Fuel Cell 2 \u2013 no longer a concern. <\/p>\n<p>\u2018Fuel Cell #2 Voltage Increase Update: (Engineering) position is that this IPR\/ PR (Interim-Problem Report) should be closed as either explained condition or as a procedure error,\u2019 added Tuesday\u2019s processing information. <\/p>\n<p>\u2018The general consensus being developed is that the increased voltage was due to minor regulator flow in the presence of residual O2 in the manifold. Additional data collection continues in an effort to support closure rationale.\u2019 <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"WIDTH: 199px; HEIGHT: 149px\" height=\"611\" alt=\"\" hspace=\"5\" src=\"http:\/\/forum.nasaspaceflight.com\/forums\/get-attachment.asp?action=view&amp;attachmentid=38873\" width=\"885\" align=\"left\" vspace=\"5\" border=\"0\/\">Launch On Need (LON) capability also appears to be on track, with ET-126 \u2013 the tank that will fly with Endeavour on STS-123, but also required as part of LON rescue support for STS-122 \u2013 undergoing similar connector testing.<\/p>\n<p>As part of that process, test results from the weekend showed that the connector appears to be in good condition, with no observation of \u2018glass cracking\u2019 \u2013 which was found with ET-125\u2019s removed LH2 Feed-through connector. <\/p>\n<p>The issue of glass cracking won\u2019t halt STS-122, but will continue to be evaluated, due to the potential concern of LH2 leaking through the crack, at pressure, during ascent. This would be a safety threat to the shuttle.<\/p>\n<p>The crack found on the removed connector from ET-125 was not seen in subsequent testing on a connector from ET-120, and even one from the now defunct X-33. <\/p>\n<p>However, a recent memo notes a request for off-tank qualification testing&nbsp;in order to&nbsp;closely replicate the in-tank environment, thus be more representative of the real-life conditions these parts are under during cryo conditions. <\/p>\n<p>\u2018ET-120 glass seal failure is a different failure mode than ET-125 \u2013 suggests loading conditions (imposed stresses) for ET-120 differ significantly from ET-125,\u2019 noted a memo that was quoting documentation that was drawn up from the \u2018Glass Team.\u2019 <\/p>\n<p>\u2018Raises concerns that current test plan will not replicate ET-125 failure mode. Raises concerns that future planned testing will create more chaos than answers. Time to regroup!\u2019<\/p>\n<p>However, these comments \u2013 typical of an engineering discussion \u2013&nbsp;are not central to the status of ET-125\u2019s newly modified connector, which has no observed cracking, but instead are part of a drive to increase&nbsp;the database of information, which should prove useful for the new connectors that are due to be installed in future tanks.<\/p>\n<p>\u2018Revise test plan to more accurately reflect flight conditions. Dedicate more than 2 units to life testing to understand scatter. Establishing clear pass\/fail criteria based on hazard control,\u2019 added the information.<\/p>\n<p>\u2018Consider accepting fewer cryo cycles in demonstrated life (do we really need 13 tankings?). Get glass experts down to MAF (Michoud Assembly Facility) to participate directly in test planning and analysis.<\/p>\n<p>\u2018The best approach is to test to failure a minimum of two (four would be better) using a test method to duplicate as closely as practical the cryo-cycling stresses during tanking\/detanking.\u2019<br \/><em><br \/><\/em><font color=\"#0000ff\"><em>L2 members<\/em><\/font><em>: All documentation&nbsp;\u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, updated live.<\/em><\/p>\n<p><em><font face=\"Arial\" color=\"#0000ff\" size=\"2\">**STARLIGHT: NEW STS-117 MISSION&nbsp;REVIEW&nbsp;MUSIC&nbsp;VIDEO**&nbsp;\u2013 STS-118 and STS-120&nbsp;Mission review video also available.<\/font><\/em><font face=\"Arial\"><\/font><font size=\"2\"><em>&nbsp;<\/em><\/font><\/p>\n<p><font color=\"#ff0000\">**ROCK YOU LIKE A HURRICANE: STS-117 MISSION&nbsp;REVIEW&nbsp;MUSIC&nbsp;VIDEO \u2013 AS SEEN BY THE STS-117 CREW!!**<\/font>&nbsp;-.<br \/><font size=\"1\">(<em>Video section is FREE, but you need to sign up as a member of the forum to enter the video section of the site. We only use your e-mail to send you your password. It will not be used for spam etc.)<\/em><\/font><em><\/em><em><font face=\"Arial\" size=\"2\"><\/font><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Work is finalizing on External Tank ET-125, following a huge effort to bounce back from the ECO (Engine Cut Off) sensor anomalies that placed a temporary halt on the surge of ISS assembly. The trimming of the newly applied foam around the LH2 Feed-through connector worksite is scheduled for Tuesday evening, with \u201ccloseouts\u201d targeted for [&hellip;]<\/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":[],"class_list":["post-41498","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41498"}],"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=41498"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41498\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}