{"id":3457,"date":"2020-07-06T21:40:41","date_gmt":"2020-07-06T13:40:41","guid":{"rendered":"http:\/\/caucanimax.com\/blog\/?p=3457"},"modified":"2020-07-10T17:45:16","modified_gmt":"2020-07-10T09:45:16","slug":"why-fmc-c-can-supply-fms2-when-only-fmc-a-fault","status":"publish","type":"post","link":"https:\/\/caucanimax.com\/blog\/why-fmc-c-can-supply-fms2-when-only-fmc-a-fault\/","title":{"rendered":"A350 \u53ea\u6709 FMC-A(B) \u6545\u969c\u65f6\uff0c FMC-C \u4e3a\u4ec0\u4e48\u4f1a\u53bb\u63a5\u7ba1 FMS 2(1)"},"content":{"rendered":"<p><a href=\"http:\/\/caucanimax.com\/blog\/why-fmc-c-can-supply-fms2-when-only-fmc-a-fault\/some-questions-about-abnormal-procedure-_01_09\/\" rel=\"attachment wp-att-3458\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3458\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_09.png\" alt=\"\" width=\"689\" height=\"564\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_09.png 689w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_09-300x246.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_09-150x123.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_09-400x327.png 400w\" sizes=\"auto, (max-width: 689px) 100vw, 689px\" \/><\/a><\/p>\n<p>\u6b63\u5e38\u7684\u63a5\u66ff\u903b\u8f91\u662f FMC-A \u6216\u8005 FMC-B \u6545\u969c\u4e86\uff0cFMC-C \u53bb\u63a5\u7ba1\uff0c\u6b64\u65f6 FMS1 \u548c 2\u90fd\u8fd8\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002\u4f46\u5982\u679c\u518d\u574f\u4e00\u4e2a FMC\uff0c\u53ea\u5269\u4e0b\u4e00\u4e2a FMC \u5c31\u53ea\u80fd\u4f9b\u4e00\u4e2a FMS \u4e86\u3002\u5c31\u4f1a\u51fa\u73b0 <span style=\"text-decoration: underline;\">AUTO FLT<\/span> FMS 1(2) FAULT \u8b66\u544a\u3002\u4f46\u662f\u5728\u8fd9\u4e2a\u8b66\u544a\u7684\u89e6\u53d1\u6761\u4ef6\u91cc\u6709\u4e00\u4e2a\u662f FMC-A is failed, and FMC-C controls FMS 2 (FMC-B cannot control FMS 1). \u6216\u8005 FMC-B is failed, and FMC-C controls FMS 1 (FMC-A cannot control FMS 2). \u8fd9\u4e2a\u5c31\u5f88\u96be\u7406\u89e3\u4e86\u3002<\/p>\n<p>\u7a7a\u5ba2\u7684\u56de\u590d\u8bf4\u8fd9\u662f\u4e2a\u4e0d\u6b63\u5e38\u7684\u73b0\u8c61\uff0c\u6ca1\u8bf4\u5177\u4f53\u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\uff0c\u4f46\u6211\u60f3\u4e5f\u6ca1\u6709\u5728\u6df1\u5165\u7684\u5fc5\u8981\u4e86\u3002\u5177\u4f53\u53c2\u8003 TechRequest \u539f\u6587\uff1a<\/p>\n<p><!--more--><\/p>\n<p><strong>Q: AUTO FLT FMS 1(2) FAULT<\/strong><\/p>\n<p>How can these two conditions happpen:<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/why-fmc-c-can-supply-fms2-when-only-fmc-a-fault\/some-questions-about-abnormal-procedure-_01_08\/\" rel=\"attachment wp-att-3459\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3459\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_08.png\" alt=\"\" width=\"700\" height=\"275\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_08.png 700w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_08-300x118.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_08-150x59.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_01_08-400x157.png 400w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n<p><strong>A:<\/strong><\/p>\n<p>Refer to CSC A350 <span style=\"text-decoration: underline;\">FCOM Aircraft Systems\/22-AFS-Flight Management System\/Abnormal Operations\/FMC Reset and Resynchronization-Abnormal Configuration of the FMCs<\/span>. The normal configuration is the following configuration:<\/p>\n<ul>\n<li>FMC-A is assigned to FMS 1<\/li>\n<li>FMC-B is assigned to FMS 2<\/li>\n<li>FMC-C is the backup FMC<\/li>\n<\/ul>\n<p>So the highlighted bullet points could happen in the case of an abnormal configuration. For example, FMC-C is assigned to FMS 1 or FMS 2. So if the FMCs are in an abnormal configuration and one FMC-A or FMC-B is failed then one of the two highlighted bullet points can happen.<\/p>\n<p><strong>Q_2:<\/strong><\/p>\n<p>In your example, &#8220;FMC-C is assigned to FMS 1 or FMS 2&#8221; can only happen if FMC-A or FMC-B is failed. And if FMC-B or FMC-A is further failed, the case is just the case 2, not case 3.<\/p>\n<p>In CASE 3, &#8220;FMC-B(A) cannot control FMS 1(2)&#8221; means FMC-B(A) is still available, but just cannot control opposite FMS. So how can it happen when FMS-B(A) is available but FMS 2(1) is controled by FMC-C?<\/p>\n<p><strong>A_2:<\/strong><\/p>\n<p>Airbus would like to clarify that FMC-C can also be assigned to FMS 1 or FMS 2 in abnormal configurations. This does not mean that FMC-A or FMC-B has to fail. In abnormal configuration, FMC-C can be incorrectly assigned to control FMS 1(2). In this configuration, the failure of FMC-A or FMC-B (depending on the case) can lead to situation labeled as \u201cCASE 3\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6b63\u5e38\u7684\u63a5\u66ff\u903b\u8f91\u662f FMC-A \u6216\u8005 FMC-B \u6545\u969c\u4e86\uff0cFMC-C \u53bb\u63a5\u7ba1\uff0c\u6b64\u65f6 FMS1 \u548c 2\u90fd\u8fd8\u80fd\u6b63\u5e38\u5de5 &#8230; <a title=\"A350 \u53ea\u6709 FMC-A(B) \u6545\u969c\u65f6\uff0c FMC-C \u4e3a\u4ec0\u4e48\u4f1a\u53bb\u63a5\u7ba1 FMS 2(1)\" class=\"read-more\" href=\"https:\/\/caucanimax.com\/blog\/why-fmc-c-can-supply-fms2-when-only-fmc-a-fault\/\" aria-label=\"\u9605\u8bfb A350 \u53ea\u6709 FMC-A(B) \u6545\u969c\u65f6\uff0c FMC-C \u4e3a\u4ec0\u4e48\u4f1a\u53bb\u63a5\u7ba1 FMS 2(1)\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113],"tags":[],"ppma_author":[5],"class_list":["post-3457","post","type-post","status-publish","format-standard","hentry","category-fly"],"authors":[{"term_id":5,"user_id":2,"is_guest":0,"slug":"yaoguai","display_name":"\u5996\u602a","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/dfe71d09a1a83f49a02a4400c69ef2c361c2d967eae2ffeeb6318b73a0da763f?s=96&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/comments?post=3457"}],"version-history":[{"count":2,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3457\/revisions"}],"predecessor-version":[{"id":3461,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3457\/revisions\/3461"}],"wp:attachment":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/media?parent=3457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/categories?post=3457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/tags?post=3457"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=3457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}