{"id":3620,"date":"2020-08-09T22:28:57","date_gmt":"2020-08-09T14:28:57","guid":{"rendered":"http:\/\/caucanimax.com\/blog\/?p=3620"},"modified":"2020-08-09T22:47:24","modified_gmt":"2020-08-09T14:47:24","slug":"a350-capt-fo-att-or-hdg-disagree","status":"publish","type":"post","link":"https:\/\/caucanimax.com\/blog\/a350-capt-fo-att-or-hdg-disagree\/","title":{"rendered":"A350 \u5de6\u53f3\u59ff\u6001\/\u822a\u5411\u4e0d\u4e00\u81f4\u7684\u8b66\u544a"},"content":{"rendered":"<p><a href=\"http:\/\/caucanimax.com\/blog\/a350-%e5%b7%a6%e5%8f%b3%e5%a7%bf%e6%80%81-%e8%88%aa%e5%90%91%e4%b8%8d%e4%b8%80%e8%87%b4%e7%9a%84%e8%ad%a6%e5%91%8a\/some-questions-about-abnormal-procedure-_02_41\/\" rel=\"attachment wp-att-3622\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3622\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41.png\" alt=\"\" width=\"1119\" height=\"378\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41.png 1119w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41-300x101.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41-1024x346.png 1024w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41-768x259.png 768w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41-150x51.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_41-400x135.png 400w\" sizes=\"auto, (max-width: 1119px) 100vw, 1119px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/a350-%e5%b7%a6%e5%8f%b3%e5%a7%bf%e6%80%81-%e8%88%aa%e5%90%91%e4%b8%8d%e4%b8%80%e8%87%b4%e7%9a%84%e8%ad%a6%e5%91%8a\/some-questions-about-abnormal-procedure-_02_42\/\" rel=\"attachment wp-att-3621\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3621\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42.png\" alt=\"\" width=\"1072\" height=\"359\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42.png 1072w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42-300x100.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42-1024x343.png 1024w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42-768x257.png 768w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42-150x50.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_42-400x134.png 400w\" sizes=\"auto, (max-width: 1072px) 100vw, 1072px\" \/><\/a><\/p>\n<p><span style=\"text-decoration: underline;\">NAV<\/span> CAPT &amp; F\/O ATT DISAGREE \u4ee5\u53ca <span style=\"text-decoration: underline;\">NAV<\/span> CAPT &amp; F\/O HDG DISAGREE \u8fd9\u4e24\u4e2a ECAM \u8b66\u544a\u662f FWS \u89e6\u53d1\u7684\uff0c\u6761\u4ef6\u662f\u201c\u4fef\u4ef0\u6216\u6eda\u8f6c\u663e\u793a\u8d85\u8fc75\u00b0\u201d\u201c\u822a\u5411\u663e\u793a\u8d85\u8fc77\u00b0\u78c1\u822a\u5411\u6216\u80055\u00b0\u771f\u822a\u5411\u201d\uff0c\u800c\u7a0b\u5e8f\u5c31\u53ea\u6709\u201c\u673a\u7ec4\u610f\u8bc6\u201d\u3002\u5bf9\u6b64\u6709\u4e24\u70b9\u7591\u95ee\uff1a<\/p>\n<ol>\n<li>\u8fd9\u4e2a\u89e6\u53d1\u503c\u662f\u5426\u8d85\u8fc7\u4efb\u4f55 ADIRU \u8b66\u544a\u7684\u9608\u503c\uff1f<\/li>\n<li>\u673a\u7ec4\u662f\u5426\u65e0\u9700\u505a\u4efb\u4f55\u68c0\u67e5\uff0c\u5982\u5bf9\u6bd4 ISIS\uff1f<\/li>\n<\/ol>\n<p><!--more--><\/p>\n<p>\u7a7a\u5ba2\u56de\u590d\u8bf4\uff0cIR \u6570\u636e\u88ab PRIM \u76d1\u63a7\uff0c\u5e76\u4f20\u8f93\u7ed9 CDS \u7528\u4e8e PFD \u4e0a\u7684\u663e\u793a\uff0c\u800c\u8fd9\u4e2a\u663e\u793a\u7684\u5185\u5bb9\u53c8\u88ab FWS \u76d1\u63a7\u3002FWS \u89e6\u53d1\u8b66\u544a\u7684\u9608\u503c\u7b49\u4e8e\u6216\u8005\u5927\u4e8e PRIM \u62d2\u9009 IR \u7684\u9608\u503c\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u5728 FWS \u8b66\u544a\u51fa\u73b0\u4e4b\u524d\u6216\u540c\u65f6\uff0c\u6709\u95ee\u9898\u7684 IR \u5c31\u88ab PRIM \u62d2\u9009\u4e86\uff0c\u4ece\u800c\u4e24\u90e8 PFD \u4e0a\u663e\u793a\u5dee\u522b\u5c31\u6d88\u5931\u4e86\u3002\u6240\u4ee5\uff0cFWS \u89e6\u53d1\u7684\u8b66\u544a\u8981\u4e48\u4e0d\u4f1a\u51fa\u73b0\uff0c\u8981\u4e48\u53ea\u51fa\u73b0\u5f88\u77ed\u7684\u65f6\u95f4\u3002\u7136\u800c\uff0c\u67d0\u4e9b\u7279\u5b9a\u60c5\u51b5\u4f1a\u53ea\u5f71\u54cd IR \u5728 PFD \u4e0a\u7684\u663e\u793a\u6570\u636e\uff0c\u6240\u4ee5\u5e76\u4e0d\u4f1a\u5bfc\u81f4\u88ab PRIM \u62d2\u9009\uff0c\u6b64\u65f6 FWS \u7684\u8b66\u544a\u5c31\u80fd\u591f\u7ed9\u673a\u7ec4\u63d0\u4f9b\u5fc5\u8981\u7684\u610f\u8bc6\u3002<\/p>\n<p>\u5728 <span style=\"text-decoration: underline;\">FCOM DSC-34-NAV-20-10-50 A ADIRS MONITORING<\/span> \u4e2d\uff0c\u5bf9\u6b64\u6709\u8f83\u8be6\u7ec6\u7684\u8bf4\u660e\uff1a<\/p>\n<p>ADIRS\u53ef\u4ee5\u63d0\u4f9b\u6570\u636e\u7ed9\u5f88\u591a\u98de\u673a\u7cfb\u7edf: ADIRU, PRIM, FADEC, FWS\u7b49\u3002\u6bcf\u4e2a\u7cfb\u7edf\u90fd\u80fd\u76d1\u63a7\u6240\u63a5\u53d7\u7684\u6570\u636e\uff0c\u5e76\u80fd\u5728\u9700\u8981\u7684\u65f6\u5019\u62d2\u9009\u6216\u8005\u91cd\u7528\u67d0\u4e9b\u6570\u636e\u3002<\/p>\n<p>ADIRU \u76d1\u63a7\u662f\u6570\u636e\u6e90\u786c\u4ef6\u672c\u8eab\uff0c\u89e6\u53d1\u7684\u662f\u786c\u4ef6\u6545\u969c\u8b66\u544a\uff1a<\/p>\n<ul>\n<li>NAV ADR 1(2)(3) FAULT<\/li>\n<li>NAV ADR 1+2(1+3)(2+3) FAULT<\/li>\n<li>NAV ADR 1+2+3 DATA DEGRADED<\/li>\n<li>NAV ADR 1+2+3 FAULT<\/li>\n<li>NAV IR 1(2)(3) FAULT<\/li>\n<li>NAV IR 1+2(1+3)(2+3) FAULT<\/li>\n<li>NAV IR NOT ALIGNED<\/li>\n<li>NAV ISIS FCUB BARO REF DISAGREE<\/li>\n<\/ul>\n<p>PRIM \u76d1\u63a7\u7684\u662f\u7528\u4e8e\u98de\u63a7\u6cd5\u5219\u8ba1\u7b97\uff0c\u4ee5\u53ca\u4f20\u8f93\u7ed9 CDS \u7528\u4e8e\u663e\u793a\u7684\u6570\u636e\uff0c\u89e6\u53d1\u7684\u662f\u98de\u63a7\u76f8\u5173\u8b66\u544a\uff1a<\/p>\n<ul>\n<li>AUTO FLT A\/THR OFF<\/li>\n<li>AUTO FLT AP OFF<\/li>\n<li>F\/CTL DIRECT LAW (PROT LOST)<\/li>\n<li>NAV AIR DATA REDUNDANCY LOST<\/li>\n<li>NAV AOA DISAGREE<\/li>\n<li>NAV ISIS ALT(ATT)(SPD) UNRELIABLE<\/li>\n<li>NAV ISIS ALT(SPD) RECOVERED<\/li>\n<li>SURV REACTIVE W\/S DET FAULT<\/li>\n<\/ul>\n<p>\u7528\u4e8e\u98de\u63a7\u8ba1\u7b97\u7684\u6570\u636e\u4e00\u65e6\u62d2\u9009\u5c31\u4e0d\u518d\u91cd\u7528\uff0c\u7528\u4e8e CDS \u663e\u793a\u7684\u5219\u53ef\u4ee5\u5728\u6570\u636e\u6062\u590d\u6b63\u5e38\u540e\u53ef\u4ee5\u91cd\u7528\u3002CDS \u663e\u793a\u91cd\u6784\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/a350-%e5%b7%a6%e5%8f%b3%e5%a7%bf%e6%80%81-%e8%88%aa%e5%90%91%e4%b8%8d%e4%b8%80%e8%87%b4%e7%9a%84%e8%ad%a6%e5%91%8a\/some-questions-about-abnormal-procedure-_02_43\/\" rel=\"attachment wp-att-3623\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3623\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_43.png\" alt=\"\" width=\"539\" height=\"180\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_43.png 539w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_43-300x100.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_43-150x50.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/08\/Some-questions-about-abnormal-procedure-_02_43-400x134.png 400w\" sizes=\"auto, (max-width: 539px) 100vw, 539px\" \/><\/a><\/p>\n<p>FADEC \u76d1\u63a7 ADIRU \u8ba1\u7b97\u7684\u6570\u636e\uff0c\u4e0e\u53d1\u52a8\u673a\u4f20\u611f\u5668\u5f97\u5230\u7684\u53c2\u6570\u8ba1\u7b97\u51fa\u7684\u6570\u636e\u5bf9\u6bd4\uff0c\u7528\u4e8e\u9009\u62e9\u6570\u636e\u6e90\u3002<\/p>\n<p>FWS \u76d1\u63a7\u5de6\u53f3\u4e24\u4fa7\u7684\u59ff\u6001\u3001\u822a\u5411\u3001\u6c14\u538b\u57fa\u51c6\u53ca\u6c14\u538b\u503c\u7b49\uff0c\u8d85\u8fc7\u9608\u503c\u5219\u89e6\u53d1\u8b66\u544a\uff0c\u7b97\u662f\u4ece\u7ed3\u679c\u4e0a\u6765\u76d1\u63a7\uff0c\u6bd4\u5982\uff1a<\/p>\n<ul>\n<li>NAV CAPT &amp; F\/O ATT DISAGREE<\/li>\n<li>NAV CAPT &amp; F\/O HDG DISAGREE<\/li>\n<li>NAV GNSS\/ACFT POS DISAGREE<\/li>\n<li>NAV CAPT &amp; F\/O BARO VALUE DISAGREE<\/li>\n<li>NAV CAPT &amp; F\/O BARO REF DISAGREE<\/li>\n<\/ul>\n<hr \/>\n<p>\u5177\u4f53\u56de\u590d\u8bf7\u53c2\u8003 TechRequest \u539f\u6587\uff1a<\/p>\n<p><strong>Q:<\/strong><br \/>\n<strong>NAV CAPT &amp; F\/O ATT DISAGREE<\/strong><br \/>\n<strong>&amp;<\/strong><br \/>\n<strong>NAV CAPT &amp; F\/O HDG DISAGREE<\/strong><\/p>\n<p>Are the threshold of these two alerts triggered by FWS (5 \u00b0 in pitch or roll, 7 \u00b0(5 \u00b0) in MAG(TRUE) ) not over the threshold of alerts triggered by ADIRU? And can crew compare the the PFD with ISIS to determine which one is correct?<\/p>\n<p><strong>A:<\/strong><br \/>\nCAPT AND F\/O ATT DISAGREE:<\/p>\n<ul>\n<li>Initially Pitch slightly increases, when the threshold of 5 DEG is exceeded, Pitch returns to normal again (automatic IR switching), CREW awareness<\/li>\n<li>On E\/WD, NAV RNP AR CAPABILTY DOWNGRADED message is displayed, on DISPATCH page, NAV IR 1(2)(3) REJECTED BY PRIM is displayed,. NO need to cross check Attitudes between PFD\/ISIS<\/li>\n<\/ul>\n<p>CAPT AND F\/O HDG DISAGREE (SINGLE MALFUNCTION):<\/p>\n<ul>\n<li>Initially HDG drifts slowly on PFD, when the threshold 7 DEG in MAG or 5 DEG in TRUE is exceeded HDG returns to normal (automatic IR switching), crew awareness<\/li>\n<li>On E\/WD, AUTO FLT APPROACH CAPABILTY DOWNGRADED and NAV RNP AR CAPABILTY DOWNGRADED message is displayed, NO need to cross check HDG with ISIS and or STDBY Compass<\/li>\n<\/ul>\n<p><strong>Q_2:<\/strong><br \/>\nIn your answers, once pitch exceeds 5 DEG (HDG exceed 7\/5 DEG) wich are the same with triggering threshold of NAV CAPT &amp; F\/O ATT DISAGREE &amp; NAV CAPT &amp; F\/O HDG DISAGREE, it will return to normal and trigger other alerts. Does that mean these 2 alerts will disappear when parameters return to normal just after triggered? So what are the use of these alerts?<\/p>\n<p><strong>A_2:<\/strong><br \/>\nIR data are sent to PRIM computers via ARINC 429 buses. The PRIM computers compare these data, and may reject one or more IR sources if they disagree. The monitoring thresholds defined at PRIM level depend on the flight conditions. If an IR source is rejected by PRIM, it will no longer display data on CDS.<\/p>\n<p>IR data displayed on CDS are primarily sent via AFDX network. The FWS compares these data. FWS monitoring thresholds are constant, and are <span style=\"color: #ff0000;\">either equal or higher<\/span> than the PRIM monitoring thresholds.<\/p>\n<p>This means that the IR data monitorings perfomed at PRIM level and FWS level are <span style=\"color: #ff0000;\">independent.<\/span><\/p>\n<p>In the most probable case of an IR failure leading to general IR data discrepancy, the PRIM monitoring will trigger first, leading to IR source switching. In this case, the FWS monitoring will <span style=\"color: #ff0000;\">not trigger, or will trigger for a very short period of time.<\/span><\/p>\n<p>However, some <span style=\"color: #ff0000;\">specific failure cases<\/span> may only affect the IR <span style=\"color: #ff0000;\">displayed<\/span> data, without leading to an automatic source switching. In such situation, it is necessary to provide awareness to the crew. This is the aim of NAV CAPT &amp; F\/O ATT(HDG) DISAGREE alert.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NAV CAPT &amp; F\/O ATT DISAGREE \u4ee5\u53ca NAV CAPT &amp; F\/O H &#8230; <a title=\"A350 \u5de6\u53f3\u59ff\u6001\/\u822a\u5411\u4e0d\u4e00\u81f4\u7684\u8b66\u544a\" class=\"read-more\" href=\"https:\/\/caucanimax.com\/blog\/a350-capt-fo-att-or-hdg-disagree\/\" aria-label=\"\u9605\u8bfb A350 \u5de6\u53f3\u59ff\u6001\/\u822a\u5411\u4e0d\u4e00\u81f4\u7684\u8b66\u544a\">\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-3620","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\/3620","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=3620"}],"version-history":[{"count":2,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3620\/revisions"}],"predecessor-version":[{"id":3625,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3620\/revisions\/3625"}],"wp:attachment":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/media?parent=3620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/categories?post=3620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/tags?post=3620"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=3620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}