**The most comprehensive collection of Shuttle, Ares, Orion and ISS related presentations and mission documentation, plus expansive daily processing documentation and updates are <\/em>available to download on L2<\/em><\/font> **<\/em><\/font><\/p>\n STS-122 L2 Special NOW LIVE. **Click here for sample of L2 menu and content**<\/font><\/em><\/p>\n <\/font>**STS-122 Special: 12 MOD Flight Readiness Review (FRR) Presentations, Baselines and Mission Overviews. 17 Shuttle FRR Presentations. Payload Presentations and vast amounts of live, uploaded images and presentations. Installation Movies (several) \u2013 already 1700 megabytes strong** <\/font><\/em><\/p>\n **COMPLETE Section on ECO\/Feedthrough Connector issues and troubleshooting, graphical and data based \u2013 expansive.**<\/p>\n **LIVE updates on Atlantis STS-122 Troubleshooting Latest**<\/em><\/font><\/p>\n **LIVE updates on Discovery STS-124 Processing**<\/em><\/font><\/p>\n <\/u><\/em><\/p>\n Company News (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<\/p>\n **LIVE news updates on Endeavour STS-123 Processing**<\/font><\/em><\/p>\n **Click here for FRR overview articles: Article 1 \u2013 Article 2** \u2013 Click *HERE* for all our articles on the STS-122 ECO\/Feedthrough Connector issue.<\/p>\n <\/p>\n ET-125 Troubleshooting Latest:<\/u><\/em><\/p>\n<\/p>\n A large contingent of engineers are calling for \u2018Option B\u2019 \u2013 which will involve the STS-122 stack being rolledback to the Vehicle Assembly Building (VAB), due to the requirement of having to enter the tank to remove the entire Feed-through assembly. Such work at the pad is no longer considered as an option.<\/p>\n Once inside the VAB, Atlantis would be de-mated from ET-125 and re-mated with ET-126 \u2013 the next tank that was scheduled to fly, with Endeavour on STS-123.<\/p>\n \u2018SE&I, NESC, KSC and JSC engineers recommend Option B: Remove entire feedthrough assembly, rollback, put orbiter onto ET-126, take ET-125 apart. Keeping everything intact improves chances of finding root cause.\u2019<\/p>\n \u2018Option A\u2019 \u2013 which, according to preliminary schedules, would allow for Atlantis to launch in around four weeks time, has the support the ECO team, who were tasked with finding a solution to the cause of the two launch scrubs earlier in the month.<\/p>\n Shuttle management is believed to be in favor of following \u2018Option A\u2019 \u2013 however, the large ranging support of \u2018Option B\u2019 may derail their wishes. <\/p>\n The forward plan for the interim is to go ahead and remove the external plug and feed-through connector, intact, to allow for cryogenic testing at the Marshall Space Flight Center (MSFC). Access to this hardware has already been gained via work by engineers at the pad over Christmas.<\/p>\n This is part of Option A, to test out the connector for any clues as to the cause of the recent ECO (Engine Cut Off) system issues.<\/p>\n \u2018Inspect Feed-thru assembly pins\/sockets, cracks in the silicon rubber grommet, and contamination or workmanship issues. (External Plug\/Feed-thru assembly will not be separated),\u2019 noted one of several presentations that were reviewed by the PRCB.<\/p>\n \u2018Measure distance from glass surface of connector to face of connector. Perform pin retention test of feed thru internal pins. Send to TS-300 for Cryo-Testing.\u2019<\/p>\n \u2018Cryogenic Bench Testing\u2019 will allow engineers to compare data gained from previous connector testing, and the recent tanking test. The hope is the additional data will help confirm the specific location of the fault on the LH2 Feed-through connector system, currently believed to be related to the pins on the external plug contacts.<\/p>\n Option B involves rollback due to the need to enter the tank, in order to remove all of the Feed-through connector, both internal and external. This would require the tent-like clean room, last seen during the ECO sensor changeouts. <\/p>\n \u2018Remove Entire Feedthru Assembly (External Plug\/ Feedthru\/Internal Plug). Partial removal of TPS for in-situ inspection of feedthru connector hardware and TPS (Same as Option A),\u2019 added the presentation on the two options. <\/p>\n \u2018Detailed dissection of TPS within J-box (surrounding connector) planned to identify any potential contributors (i.e. excessive cracking or intrusion into connector body) \u2013 Not expected based on results from ET-120<\/p>\n <\/dir><\/ol>\n \u2018Visual inspections of connector hardware internal \/ external) with moisture proofing and TPS material in place. Inspections provide baseline of hardware configuration prior to removal. Remove Assembly intact by cutting within the cable tray and into the Tank wiring. Install Temporary Blankoff Plate at the Feedthru hole.\u2019<\/p>\n ET-126 operations in the VAB will continue to be placed on hold, while more data is gathered, before what currently appears to be a final decision on the forward plan \u2013 on rollback or R&R at the pad \u2013 at the next PRCB, due on January 3.<\/p>\n Option A\u2019s timeline has already been mapped out, with work at the pad showing a schedule that would allow for completion and certification by the end of January. Returning to a launch posture, post R&R, would allow for a launch date to be set in early February.<\/p>\n However, this remains a fluid situation, with further debate on which option to take set to take place over the coming week.<\/p>\n Further articles, based on the expansive PRCB presentations acquired by L2, will follow. **STARLIGHT: NEW STS-117 MISSION REVIEW MUSIC VIDEO** \u2013 STS-118 and STS-120 Mission review video also available.<\/font><\/em><\/font> <\/em><\/font><\/p>\n **ROCK YOU LIKE A HURRICANE: STS-117 MISSION REVIEW MUSIC VIDEO \u2013 AS SEEN BY THE STS-117 CREW!!**<\/font> -. Two options were debated by the all-powerful PRCB (Program Requirements Control Board) meeting, one of which will allow Atlantis to aim for a late January \u2013 or more likely \u2013 early Febuary launch date, the other involving rollback. Currently, \u201cOption A\u201d appears to have the support of shuttle management, which will involve the soldering of […]<\/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-41516","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41516"}],"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=41516"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41516\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/em><\/font>L2: STS-122 to STS-127 documentation already available.<\/em><\/font><\/p>\n
\n\u2018ECO Team recommends option A: remove external plug and feedthrough, keeping intact, for root cause testing <\/b>(internal plug not removed.<\/b>)\u2019<\/p>\n**Ride home through the fire, sparks and plasma of re-entry with Atlantis, Discovery and Endeavour. FIVE Stunning high quality 2hr, 355-400mb Camcorder and HUD videos \u2013 from payload bay closure \u2013 through re-entry with an astronaut held camcorder video \u2013 to post landing \u2013 several more videos showing landing from 90,000 ft also available and HUD videos from STA landings. Now includes HALO II Re-entry video, and re-entry videos from Gemini and Apollo (converted from 8mm)**<\/em><\/font><\/p>\n
\u2018Examine and photograph feed thru assembly for signs of damage. Sample Feed-thru Internal plug pins for contamination. Nano-Focus X-ray for bent pins, engagement, cracked grommet and tolerance issues. <\/p>\n
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As far as actually solving the issue of the open circuit on the connector, engineers are favoring the approach last used by the Atlas program, that of soldering the pins and wires in place. This plan is still being worked.<\/p>\n
<\/em>L2 members<\/em><\/font>: All documentation \u2013 from which the above article has quoted snippets \u2013 is available in full in the related L2 sections, updated live.<\/em><\/p>\n
(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><\/font><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"