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After the payload was secured in the PGHM, the Rotating Service Structure was moved around orbiter Atlantis last weekend and her Payload Bay doors were opened earlier this week ahead of payload installation today.<\/p>\n
Over the next few days, payload integration checks with Atlantis\u2019 systems will be performed ahead of final Flight Crew inspection of the payload a few days before launch.<\/p>\n
Under current schedules, Atlantis\u2019 Payload Bay Doors are scheduled to be closed for launch on November 12 ahead of the planned November 16 launch.<\/p>\n
![\"A2\"](\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2009\/11\/A23.jpg\" "\\"A2\\"")
Overall, no issues are expected with the payload installation and integration checks with orbiter Atlantis due to the superb effort of NASA and contractor engineers in their handling and pre-pad delivery checkouts of the ELCs.<\/p>\n\u201cEngineering products (data, requirements, drawings) and integration analyses have been completed,\u201d notes the Payload\/Cargo Engineering Status presentation to the Space Shuttle Program (SSP) Flight Readiness Review (FRR) in mid-October.<\/p>\n
NASA mission updates
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For this flight, the Payload Data AFT C Aft Power Controller Assembly #3 (APCA 3) will supply power to the S-band Antenna Support Assembly (SASA) Flight Support Equipment \u201cthermostatically controlled heaters.\u201d<\/p>\n
For the SASA, the Payload\/Cargo Engineering department reviewed the possible effects to the SASA should the APCA 3 fail \u201cON\u201d or \u201cOFF.\u201d<\/p>\n
If the APCA 3 should fail \u201cON,\u201d there will be no impact to ascent and entry.<\/p>\n
\u201cSASA FSE heaters thermostatically controlled,\u201d notes the Payload\/Cargo Engineering FRR presentation. \u201cMain safety concern was the potential hazard event from an ignition source caused if thermostat cycling occurs with Payload Bay Doors closed.\u201d<\/p>\n
Since the SASA engineers were able to provide data supporting the fact that the Flight Support Equipment thermostat heaters are \u201chermetically sealed\u201d (and are thus not an ignition source), the SSP FRR was able to accept the potential failed \u201cON\u201d condition of the APCA 3.<\/p>\n
Similarly, there are no impacts to Atlantis or EVA operations if the APCA 3 fails \u201cON.\u201d<\/p>\n
Likewise, should the APCA 3 fail \u201cOFF,\u201d there is no mission impact because \u201cSASA is safe without services.\u201d<\/p>\n
Payload Engineering Status:<\/p>\n
In terms of the Payload for STS-129, the Payload community has no deferred conditions and only one (approved) unexplained anomaly.<\/p>\n
This unexplained anomaly relates to a Power Controller Unit heater. \u201cPCU heater mat 120 VDC redundant heaters open circuit. Disposition approved on 10\/8\/09,\u201d notes the Payload\/Cargo Engineering report.<\/p>\n
STS-129 Specific Articles: http:\/\/www.nasaspaceflight.com\/tag\/sts-129\/<\/p>\n
Additionally, five Orbiter Lost and Found and two payload Problem Reports were reviewed by the payload community. The items have been closed by the appropriate authorities and are not a concern for flight.<\/p>\n
However, the payload processing teams did work one late issue that was discovered during ICD walkdown of ELC 1 and ELC 2.<\/p>\n
\u201cDuring the ICD walkdown of ELC1 and ELC2 on 10\/9\/09, a significant envelope violation was discovered with both Pump Module Orbital Replacement Unit (ORU) Multi-Layer Insulation (MLI) enclosures.\u201d<\/p>\n
The violation was observed on the outboard, lower edge of the both ORU MLI enclosures. These enclosures are \u201cfurther outboard and below where expected\/intended.\u201d<\/p>\n
This creates a contact concern between the ORU MLI and Atlantis\u2019 Payload Bay cable trays.<\/p>\n
L2 members<\/em><\/em>: 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":"
With less than two weeks to go before the scheduled launch of Space Shuttle Atlantis to the International Space Station (ISS), technicians at Launch Pad 39-A have begun installing the STS-129 payload into Atlantis\u2019 Payload Bay. Meanwhile, overall preparations for Atlantis\u2019 launch continue on track \u2013 with no major pad processing issues of note. Payload […]<\/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":[9199],"class_list":["post-40946","post","type-post","status-publish","format-standard","hentry","category-news","tag-sts-129"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40946"}],"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=40946"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/40946\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=40946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=40946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=40946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}