**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 <\/font>**STS-122 Special: 29 Flight Readiness Review (FRR) Presentations, Baselines and Mission Overviews. **Click here for FRR overview articles: <\/font><\/em>Article 1<\/em><\/font><\/font> \u2013 <\/em><\/font>Article 2<\/em><\/font><\/font>**<\/em><\/font> Payload Presentations and vast amounts of live, uploaded images and presentations, movies (several) \u2013 already 3000 megabytes strong** <\/em><\/p>\n **COMPLETE Section \u2013 over 1350mbs of presentations \u2013 on ECO\/Feedthrough Connector issues and troubleshooting, graphical and data based \u2013 expansive.**<\/p>\n **LIVE updates on Atlantis STS-122 PRE-LAUNCH Latest**<\/em><\/font><\/p>\n **LIVE updates on Discovery STS-124 Processing**<\/em><\/font><\/p>\n <\/u><\/em><\/p>\n<\/p>\n Rocket launch schedules (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<\/p>\n **LIVE news updates on Endeavour STS-123 Processing**<\/font><\/em><\/p>\n STS-122 ECO related news content (all exclusives): *Scrub 1* \u2013 *MMT Debate* \u2013 *Scrub 2* \u2013 *Hale Memo* \u2013 *Forward Plan* \u2013 *Culprit Found* \u2013 *Tanking Test* \u2013 *Repair Options* \u2013 *MAF Plan* \u2013 *PRCB Debate* \u2013 *Plan Approved* \u2013 *Repair Schedule* \u2013 *Launch Date* \u2013 *New Issue* \u2013 *Hale Rallying Call* \u2013 *PRCB Launch Dates* \u2013 *New Connector Installed* \u2013 *Positive Test Results* \u2013 *Manifest Impacts* \u2013 *Optimism with forward plan* \u2013 *Flight Rationale* \u2013 *Repairs Finalizing* \u2013 *Root Cause Confirmed*<\/p>\n STS-122: Hose related news content (all exclusives): *Issue found\/fleet to be checked (December)* \u2013 *Atlantis found to have problem* \u2013 *Managers discuss forward plan* \u2013 *Use of pole to aid retract*<\/p>\n LATEST:<\/u><\/em><\/p>\n Sunday evening: SUCCESS!!! Hose retracted, payload bay doors closed for flight (10pm Eastern). STS-122 is GO for proceed to S0007!<\/p>\n Only eight door closure cycles were required, with the special tool on the end of the pole used on six of those cycles, as the doors were closed. The hose did not appear to show any problems during the closure, and may not have actually needed the tool.<\/p>\n This means the hose may retract without issue ahead of re-entry, adding to the good news.<\/p>\n Atlantis is now is a good posture to continue with the move to the start of the S0004 launch countdown later on Monday.<\/p>\n Pre-retraction article:<\/u><\/em><\/p>\n The concern with such a kink in the hose relates to the possibility of the hose cracking under the stresses of the Omega bend, which may cause a Freon leak on orbit.<\/p>\n \u2018OV-104 (Atlantis) starboard aft radiator retract flex hose found to be distorted during PLB (Payload Bay) door open at the pad. OV-103 (Discovery) starboard aft radiator retract flex hose found to be distorted after OPF PLB door closure in mid December 2007,\u2019 opened a large PRCB (Program Requirements Control Board) overview presentation \u2013 available on L2.<\/p>\n \u2018Both flex hoses have an omega bend with the starboard payload bay door closed (other three hoses nominal). <\/p>\n \u2018Concerns: Flex hose in an uncertified configuration for flight. Flex hose distortion could result in FCL leakage. Distortion increases risk of leakage due to reverse bending.\u2019<\/p>\n While a root cause is unknown, engineers checked images of Discovery\u2019s previous two pre-flight processing flows and noticed the bend on her hose \u2013 one of four which carry the freon cooling liquid to the orbiter\u2019s radiators \u2013 may have worsened over a number of flights.<\/p>\n \u2018Four open\/close cycles done at Huntington Beach (Boeing) while measuring torque on hose. No leakage noted. <\/p>\n \u2018Torque required was larger than normal, but an order of magnitude less than door mechanism capability. X-rays show flattened convolutes. Evaluation of observed braid damage indicates that it may have been induced by one or more flights.\u2019<\/p>\n Opening findings on Discovery\u2019s now removed hose shows damage appears to be related to ascent vibration contact with upper roller in the omega bend configuration. Meanwhile, Endeavour has also been checked, and is found to have no issues with her freon loop hoses.<\/p>\n X-Ray results:<\/u><\/i><\/b><\/p>\n Crucially, Atlantis\u2019 hose does not appear to have suffered anything more than small cosmetic damage, following last week\u2019s X-Ray and visual inspections \u2013 and is deemed to be in a better condition than the hose on Discovery.<\/p>\n \u2018Verified no flow (of freon) restriction due to bend. Verified no leakage (via) 10 minute, system pressure test. Hands on inspection showed no evidence of significant damage to the flex hose<\/p>\n \u2018While X-rays do not have the capability to detect micro-cracks, hose from OV-104 has experienced significantly less plastic deformation than that from OV-103.\u2019<\/p>\n Side view X-rays of the hoses at the collar on both Atlantis and Discovery noted a \u2018series of deformed, or flattened, convolutes on the OV-103 hose at the ID of the bend radius basically covering the entire view. On the OV-104 hose, there may or may not be a single deformed convolute (the second convolute out from the collar).<\/p>\n \u2018Side view of hoses at center of bend: A few (around five) deformed, or flattened, convolutes on the OV-103 hose at the ID of the bend radius. Possibly one or two deformed convolutes on the OV-104 hose.\u2019<\/p>\n \u2018Side view of hoses looking under the collar. A few deformed, convolutes on the 103 hose. On the 104 hose it all looks good. Permanent deformation is evident on OV-103\u2019s hose both pressurized and unpressurized.<\/p>\n <\/u><\/i><\/b><\/p>\n Flight Rationale:<\/p>\n<\/p>\n On Friday, shuttle managers concluded that a successful retraction of the hose back into its box is the preferred option, with no safety risk associated with the orbiter, due to the ability to automatically isolate the freon loop on the hose, should it show signs of leakage during the payload bay door closure on orbit ahead of re-entry.<\/p>\n \u2018Path to Flight Rationale: Fly as-is. Preferred option is to assist hose retraction into the container. Returns hose to certified ascent configuration save for condition induced by omega bend. Stress and loads engineering judgment deems this configuration to be less stressful than the out-of-the box omega bend condition.<\/p>\n \u2018Risk of leakage during flight is a mission success risk only, not safety-of-flight. Flying with hose in omega bend condition requires more engineering assessment and would be a more significant risk of mission success.\u2019<\/p>\n \u2018Risk Assessment: Distorted flex hose could result in leak\/loss of FCL (Freon Coolant Loop) or restricted flow during flight. Evaluated radiator isolation and determined that system risks for two-phase fluid dynamics outweigh potential for hose failure. <\/p>\n \u2018Small to moderate radiator retract flex hose leaks mitigated by auto radiator isolation capability in Ops 2. Loss of cooling capacity for cold-soaked radiator can be compensated by early ammonia boiler activation. Orbiter cooling provided primarily by the FES (Flash Evaporation System) during de-orbit\/entry.<\/p>\n \u2018Catastrophic failure of flex hose would result in complete loss of FCL before radiators could be isolated. Low risk, since distorted hoses did not leak during 12 cycles on vehicle or at HB (Huntington Beach).\u2019<\/p>\n \u2018Acceptable for STS-122 Flight: X-rays of OV-104 shows hose is in an acceptable condition. Condition of OV-103 hose envelopes OV-104 hose. OV-103 hose did not leak after multiple ground and test cycles. Braid damage analysis indicates that OV-103 hose may have flown multiple times in omega bend condition.<\/p>\n \u2018No visible evidence to suggest the OV-104 hose has flown in omega bend condition. Qualtest experience of 39 mission duty cycles x scatter factor of 4 (0-180 degrees travel plus vibration and pressure) showed no leakage. Limited omega flexures this flow and no flight environments since <\/p>\n \u2018Testing demonstrated that hose can successfully be returned to an in-the-box configuration. In-the-box configuration is as close to nominal ascent conditions as possible. Distorted hose condition is only a mission success risk, not safety-of-flight.\u2019<\/p>\n Retraction of the hose via special tool:<\/u><\/i><\/b><\/p>\n The technician has already practised the technique at Boeing\u2019s Huntington Beach facility, which proved to be successful on the three occasions the retraction was performed. He has since been flown back to KSC to assit with the retraction.<\/p>\n \u2018Overall plan for \u2018assisting\u2019 hose back into box for launch: Proof of concept testing has been completed at Huntington Beach. Hose \u2018manipulation\u2019 was successful and repeatable at 130 psia. Hose was successfully \u2018guided\u2019 into the container 3 times.<\/p>\n \u2018Tool concept was also verified during Huntington Beach testing. Some minor modifications may be made to the tygon saddle of the KSC tool based on the configuration tested at Huntington Beach.\u2019<\/p>\n The closure of the payload bar doors will be stepped, allowing the engineer to carry out the manipulation of the hose at various points of the retraction process.<\/p>\n \u2018Current plan: Nominal closure of port payload bay door with final inspection of forward and aft retract hoses. Stepped closure of starboard door (approximately 10 degree increments).<\/p>\n \u2018At each stop point, access will be established and the \u2018tool\u2019 will be used to position\/guide hose to allow for normal retraction into box. Access for first 2-4 increments (or as long as clearances allow) will be from a ladder placed as close to the hinge line as possible and using the tool (or by hand) to position the hose. <\/p>\n \u2018Once clearances no longer allow for close up operations, tool will be attached to extension rod and directed from centerline of vehicle and in between payload and OBSS (Orbiter Boom Sensor System). <\/p>\n \u2018Last increment where access will be available is approximately 20 degrees open. Huntington Beach testing showed that 20 degrees open is past the last point where adjustment\/guidance is required to ensure normal retraction into the container during the last 20 degrees of door movement.\u2019 <\/p>\n <\/u><\/i><\/b><\/p>\n If retraction is unsuccessful:<\/p>\n<\/p>\n The alternative options \u2013 ones which would come into play should there be a problem with the retraction of the hose at the pad \u2013 would led to one to two months worth of delays to STS-122.<\/p>\n Timelines and processes have already been drawn up for both R&R at the pad, and R&R back in Atlantis\u2019 Orbiter Processing Facility (OPF) \u2013 with the latter the most likely, due to the challenges of completing the task at the pad.<\/p>\n \u2018Radiator Retract Assembly replacement has never been performed at KSC. Access for rework is intrusive and non-standard for vertical operations. Freon deservicing timeline unknown due to vehicle orientation<\/p>\n \u2018Radiator retract assembly installation procedure is still undefined. Rigging procedure and functional retests are also undefined.\u2019<\/p>\n Hopefully, neither will be required, due to the confidence with both the safety assessments and the retraction process. <\/font><\/font>Click here for MaxQ\u2019s Stunning Apollo I\/Challenger\/Columbia Tribute Video \u2018New Days Will Rise\u2019.<\/em><\/font><\/p>\n **STARLIGHT: NEW STS-117 MISSION REVIEW MUSIC VIDEO**<\/font><\/em> \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> -. Engineers have successfully retracted the starboard aft radiator retract flex hose and have closed the payload bay doors \u2013 required ahead of the S0007 Launch Countdown. The retraction \u2013 completed by 10pm local time on Sunday evening \u2013 was aided by an engineer guiding the hose back into its box via a special tool on […]<\/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-41491","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41491"}],"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=41491"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/41491\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=41491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=41491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=41491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/em><\/font>STS-122 L2 Special NOW LIVE. <\/em><\/font>**Click here for sample of L2 menu and content**<\/font><\/em><\/p>\n
Sunday afternoon: Process to start at 8pm Eastern on Sunday. Remote Manipulator System (RMS) and OBSS (Orbiter Boom Sensor System) to be stowed a few hours ahead of the operation.<\/p>\n
Engineers found the problem with the hose via boroscope inspections, called after a similar problem was found on sister ship Discovery \u2013 the first time such an issue had been observed. <\/p>\n
\u2018Evaluation of photos from STS-116 and STS-120 pad flow show change in flex hose geometry in the door open position which may indicate hose had already experienced omega bend,\u2019 noted the presentation.<\/p>\n
\u2018Two broken strands approximately 8\u201d from the collar (acceptable). Some disturbed braids approximately 2\u201d from the flex hose collar, but no damage consistent with a crease. X-rays show little or no change from nominal configuration. <\/p>\n
Confirming the hose is acceptable to fly as-is for flight, is based both on the condition of the hose, and the mitigation processes that are built in \u2013 should there be a leak \u2013 and the abundance of flight history. <\/p>\n
The process, which will be carried out by a United Space Alliance technician, calls for a large element of skill, as he helps guide the hose back into its box via a special tool at the end of a long pole.<\/p>\n
\u2018R&R at OPF or pad: OPF R&R would delay launch approximately two months. R&R at pad probably feasible, but with significant technical risk. Results in an unknown launch delay, at least one month.\u2019<\/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":"