Technicians at the NASA Shuttle Logistic Depot in Cape Canaveral, Fla., continue additional testing today on a faulty power distribution box, called a Load Control Assembly 2 (LCA-2). It was removed Tuesday morning from the aft compartment of space shuttle Endeavour on Launch Pad 39A at NASA\u2019s Kennedy Space Center.<\/p>\n
Technicians are trying to determine what caused the power box to fail. Initial testing from yesterday shows a driver (circuit) inside the LCA-2 shorted out. The LCA-2 feeds power to heaters on the fuel line for Endeavour\u2019s auxiliary power unit-1 (APU-1). Initially, when the shorted out driver was replaced, the LCA-2 appeared to worked as designed.<\/p>\n
\u202aTechnicians are performing additional failure analysis on the driver today to confirm whether the short experienced by the system came from inside or outside the LCA-2. Depending on the results, additional testing of the box may be required.<\/p>\n
\u202aOn Launch Pad 39A, a new LCA-2 box was installed into Endeavour Wednesday morning, and technicians are retesting the system before Endeavour\u2019s next launch attempt is scheduled. Currently, Endeavour\u2019s no earlier than launch date remains May 10.<\/p>\n
\u202aThe APU-1 fuel line heaters did not work on April 29, prompting the launch team to scrub the Endeavour\u2019s first launch attempt for the STS-134 mission to the International Space Station.<\/p>\n","protected":false},"excerpt":{"rendered":"
Technicians at the NASA Shuttle Logistic Depot in Cape Canaveral, Fla., continue additional testing today on a faulty power distribution box, called a Load Control Assembly 2 (LCA-2). It was removed Tuesday morning from the aft compartment of space shuttle Endeavour on Launch Pad 39A at NASA\u2019s Kennedy Space Center.<\/p>\n
Technicians are trying to determine what caused the power box to fail. Initial testing from yesterday shows a driver (circuit) inside the LCA-2 shorted out. The LCA-2 feeds power to heaters on the fuel line for Endeavour\u2019s auxiliary power unit-1 (APU-1). Initially, when the shorted out driver was replaced, the LCA-2 appeared to worked as designed.<\/p>\n
\u202aTechnicians are performing additional failure analysis on the driver today to confirm whether the short experienced by the system came from inside or outside the LCA-2. Depending on the results, additional testing of the box may be required.<\/p>\n
\u202aOn Launch Pad 39A, a new LCA-2 box was installed into Endeavour Wednesday morning, and technicians are retesting the system before Endeavour\u2019s next launch attempt is scheduled. Currently, Endeavour\u2019s no earlier than launch date remains May 10.<\/p>\n
\u202aThe APU-1 fuel line heaters did not work on April 29, prompting the launch team to scrub the Endeavour\u2019s first launch attempt for the STS-134 mission to the International Space Station.<\/p>\n","protected":false},"author":27,"featured_media":612598,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-94303","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shuttle-update"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/94303","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=94303"}],"version-history":[{"count":0,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/94303\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/612598"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=94303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=94303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=94303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}