**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 1400 megabytes strong** <\/font><\/em><\/p>\n **COMPLETE Section on ECO issues and troubleshooting, graphical and data**<\/p>\n **LIVE updates on Atlantis STS-122 Troubleshooting Latest**<\/em><\/font><\/p>\n **Click here for FRR overview articles: Article 1 \u2013 Article 2** <\/font><\/p>\n SpaceX (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n Troubleshooting Latest: \u2018Flight hardware testing, STS-122, ETs, Orbiters, Flight Spares, Off-Line testing to understand possible causes, Test Beds, NDE, etc,\u2019 noted the presentation. \u2018Analysis of hardware configurations and environmental effects.\u2019<\/p>\n The root cause of the problems is still unknown, though an opening candidate list has been drawn up, in order to try and pinpoint the problem that is downstream of the sensors themselves. <\/p>\n \u2018ET Sensor Failure Due To High Resistance Above False Dry Value Due To Broken Lead Wire. ET LLCO (Low Level Cut Off) Harness High Resistance Due To Broken \/ Damaged Conductor. ET Connector High Resistance Due To Recessed Pin or Socket,\u2019 listed the 33 page presentation, dated December 11, and available on L2.<\/p>\n \u2018ET Connector High Resistance Due To Contamination that causes an Insulation Between the Pins and Sockets. ET Wire Splice High Resistance Due To Broken \/ Damaged Conductor. Tolerance Stack Up in feed-thru connector.\u2019<\/p>\n Two options were laid out in the presentation. The second option worked on the basis of relying on data to try and find the component that is at fault, replacing it, and reconfiguring the vehicle for launch.<\/p>\n However, it was the first option, which includes carrying out a tanking test on the ET out at the pad, that was recommended to the PRCB. This option also includes the use of a Time-Domain Reflectometer (TDR), injecting a pulse into a line and watching for reflections. <\/p>\n TDR utilizes a method of recording the time between sending a pulse \u2013 and receiving a reflection \u2013 that will give engineers the length of cable between where they injected the pulse and the reflection occurred. <\/p>\n Because reflections occur at changes in impedance, by recording the amplitude of the reflection, the approximate change in impedance can be determined. This will allow for a plot of impedance, versus length along the cable, hopefully aiding the pinpointing of the open circuit.<\/p>\n \u2018Perform cryogenic cycle of at least LH2 tank to develop a thermal profile across suspect components in order to induce and capture a failure. Develop a real time Time Domain Reflectometry (TDR) test to be performed during the cryogenic cycle. May require personnel access to the pad during a stable cryogenic condition,\u2019 the presentation noted as option one.<\/p>\n \u2018TDR test location will be at a created splice point in the Orbiter AFT as to not disrupt vehicle connector configuration. TDR methodology requires characterization of the flight hardware, like flight hardware and TDR connections. Point sensor data will be available to the test team except during TDR.<\/p>\n \u2018Cryogenic cycle approach will be directed as a part of IPR (Interim Problem Report) troubleshooting. The IPR will be used to define test parameters. The vehicle will have the minimum configuration required to perform the cryogenic cycle troubleshooting.\u2019<\/p>\n A \u2018collaboration\u2019 of tests is also noted by the presentation, which includes testing of old components \u2013 such as the LH2 feedthrough connector \u2013 at various levels of cryogenic levels.<\/p>\n \u2018Review ET-120 flight hardware past test results and determine any new cryogenic testing on components. Develop cryogenic bed testing of a standard feed thru connector configuration with varying moisture levels.<\/p>\n \u2018Develop cryogenic bed testing with off nominal feed thru connector configurations. Develop NDE (x-ray) capability for on pad ET feed thru\/ET harness location. Develop hardware stock sweeps and lot date relationship of components. Determine tolerance analysis of open potential causes.\u2019<\/p>\n The recommendation of utilizing option one is aimed at providing a launch opportunity \u2018very early\u2019 in January of next year. Currently the NET (No Earlier Than) launch target is January 2.<\/p>\n \u2018Key Decisions: Proceed with Option 1: Test under Cryogenic Thermal conditions recommended to most likely capture failed condition,\u2019 added the presentation.<\/p>\n \u2018TDR plan to splice in the Orbiter AFT upstream of the New production break connector and take data during Cryogenic testing. Characterization of TDR process required prior to Cryogenic testing. Procedure development will drive readiness to test. IPR will be used to document configuration, parameters, requirements, etc.<\/p>\n \u2018Collaborative Test Suite being developed to enhance STS-122 testing and provide supporting data for potential causes. Upon review of both the Orbiter and ET options to break into the ECO circuit, the engineering community recommends the Orbiter option number 1 (which includes the splicing of associated wiring in the orbiter aft).\u2019<\/p>\n Meanwhile, Shuttle manager Wayne Hale praised the troops for their efforts over the two launch attempts, from the engineers involved with the vehicle, to the managers involved with the two ECO-related Mission Management Team (MMT) meetings. <\/p>\n Transcripts of the two MMT meetings have been acquired by this site\u2019s L2 sections, which gave a fascinating insight into a passionate, but highly professional debate.<\/p>\n \u2018Mr. Hale appreciates the team\u2019s hard work over the last week. Are proud that at every step of the way, every position was presented and considered. We acted with only a very measured and thoughtful process. <\/p>\n \u2018In the end, it wasn\u2019t a good plan for us to launch, so we didn\u2019t. We\u2019re on a path to find the cause of the problems in this particular system that\u2019s given us so much trouble in the past. Have set a NET launch date of January 2, 2008. <\/p>\n \u2018That really is operationally the first date we could launch in the next launch period. Don\u2019t intend to drive teams to solve it by then, but need a date to work against.\u2019 **STARLIGHT: NEW STS-117 MISSION REVIEW MUSIC VIDEO** \u2013 STS-118 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> -. Tuesday\u2019s Program Requirements Control Board (PRCB) meeting has created a troubleshooting plan, one they hope will allow STS-122 to launch in early January. The plan works on the basis of identifying the cause of the ECO (Engine Cut Off) sensor system issues during Atlantis\u2019 two launch attempts. The recommendation of a tanking test \u2013 to […]<\/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-41528","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41528"}],"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=41528"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41528\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41528"}],"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
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NASA\u2019s plan was drawn up to \u2018determine the troubleshooting plan required to support the next launch attempt.\u2019 In total three methods will be used to gather the required data and generate supporting rationale for the next launch attempt. <\/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
<\/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":"