![\"\"](\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2023\/05\/Manage-or-select-VAPP-when-slats-flaps-jammed_image_1-972x1024.png\")
<\/a><\/p>\n<\/p>\n
A320 \u7a0b\u5e8f\u4e2d\u53ea\u8bf4\u4e86\u8981\u51cf\u901f\u5230\u8ba1\u7b97\u7684\u8fdb\u8fd1\u901f\u5ea6\uff0c\u6ca1\u8bf4\u7ba1\u7406\u8fd8\u662f\u9009\u62e9\u3002A350 \u7a0b\u5e8f\u4e2d\uff0c\u5728\u4e00\u5f00\u59cb\u5199\u4e86\u201cUSE SELECTED SPEED\u201d\uff0c\u867d\u7136\u7406\u8bba\u4e0a\u540e\u9762\u90fd\u5e94\u8be5\u6309\u7167\u8fd9\u53e5\u8bdd\u6267\u884c\uff0c\u4f46\u6ca1\u6709\u518d\u8bf4\u4e5f\u53ef\u80fd\u4f1a\u5bf9\u673a\u7ec4\u9020\u6210\u8bef\u89e3\u3002<\/p>\n \u5982\u679c\u5728\u8ba1\u7b97\u4e86\u4e0d\u6b63\u5e38\u60c5\u51b5\u4e0b\u7684 Vapp\uff0c\u5e76\u5728\u6027\u80fd\u9875\u9762\u505a\u4e86\u4fee\u6539\uff0c\u9009\u62e9\u901f\u5ea6\u548c\u7ba1\u7406\u901f\u5ea6\u662f\u4e00\u6837\u7684\uff0c\u800c\u7ba1\u7406\u901f\u5ea6\u8fd8\u6709\u6700\u5c0f\u5730\u901f\u529f\u80fd\u53ef\u7528\u3002\u5982\u6b64\u770b\u6765\uff0c\u4f7f\u7528\u7ba1\u7406\u901f\u5ea6\u66f4\u6709\u4f18\u52bf\u3002<\/p>\n \u7a7a\u5ba2\u8ba4\u4e3a\uff0cA350 \u786e\u5b9e\u53ef\u4ee5\u4f7f\u7528\u7ba1\u7406\u901f\u5ea6\uff0c\u4f46\u51fa\u4e8e\u4ee5\u4e0b\u51e0\u70b9\u8003\u8651\uff0c\u4ecd\u7136\u5efa\u8bae\u4f7f\u7528\u9009\u62e9\u901f\u5ea6\uff1a<\/p>\n \u7b2c 1 \u6761\u548c\u7b2c 4 \u6761\u8fd8\u662f\u6bd4\u8f83\u5408\u7406\u7684\uff0c\u5c24\u5176\u662f\u7b2c 4 \u6761\uff0c\u5982\u679c\u6700\u5c0f\u5730\u901f\u610f\u4e49\u4e0d\u5927\uff0c\u90a3\u4e48\u7ba1\u7406\u901f\u5ea6\u6700\u53ef\u80fd\u7684\u4f18\u52bf\u5c31\u6ca1\u6709\u4e86\u3002<\/p>\n \u5173\u4e8e\u7b2c 2 \u6761\u5de5\u4f5c\u8d1f\u8377\uff0c\u4e2a\u4eba\u89c9\u5f97\u6ca1\u6709\u4ec0\u4e48\u9053\u7406\uff0c\u56e0\u4e3a\u8fdb\u8fd1\u901f\u5ea6\u7684\u8f93\u5165\u662f\u5728\u8fdb\u8fd1\u51c6\u5907\u671f\u95f4\u5c31\u5b8c\u6210\u4e86\u7684\uff0c\u800c\u4e0d\u662f\u5728\u4e94\u8fb9\u518d\u6765\u8f93\u5165\uff0c\u800c\u5c31\u7b97\u4e94\u8fb9\u518d\u8f93\u5165\u4e5f\u4e0d\u662f\u4ec0\u4e48\u5927\u4e8b\u513f\u3002<\/p>\n \u5173\u4e8e\u7b2c 3 \u6761\u7684”\u67d0\u4e9b\u60c5\u51b5”\uff0c\u7ecf\u8fc7\u518d\u6b21\u8be2\u95ee\uff0c\u7a7a\u5ba2\u89e3\u91ca\u662f\u8fd9\u79cd\u60c5\u51b5\u975e\u5e38\u6781\u7aef\uff0c\u51e0\u4e4e\u4e0d\u53ef\u80fd\u51fa\u73b0\uff0c\u6bd4\u5982\u5931\u53bb\u6240\u6709 ADR \u548c\u5907\u7528\u6e90\u6570\u636e\u3002<\/p>\n TechRequest\u539f\u6587<\/strong><\/p>\n Q1 :<\/strong><\/p>\n In case of slat\/flaps failure or jammed, we have to select speed for extending configuration. And when the landing config is established, should we manage or select VAPP?<\/p>\n In ABN PRO, “USE SELECTED SPEED” is capital emphasized. And in the video of AIRBUS-WIN, VAPP is also selected.<\/p>\n But after landing performance computing and VAPP revised, the selected and managed VAPP are the same. Why don’t we manage it with the benefit of GS MINI?<\/p>\n A1 :<\/strong><\/p>\n On A350, the FCTM PR\/AEP\/F_CTL.F\/CTL.Abnormal Slats\/Flaps Configuration states Airbus recommends<\/span> to use the selected speed sets at the computed Vapp in the case of Abnormal Slats\/Flaps Configuration for the following reasons: On A350, it is still possible<\/span> to use managed speed for landing, but for the above reasons, Airbus recommends the use of selected speeds.<\/p>\n Q2 :<\/strong><\/p>\n \u201cIn some scenarios, the characteristic speeds may not be available\u201d. Will those scenarios can only happen in A320 and A330, or in A350 as well?<\/p>\n A2 :<\/strong><\/p>\n In response to your request, we would like to confirm that whereas it is less likely to happen on A350 than on other aircraft, situations leading to the loss of the characteristics speeds may also occur on A350.<\/p>\n Indeed, scenario such as the loss of all ADRs and backup sources<\/span> (FADECs and AOA probes) for example can lead to the loss of the speed informations.<\/span><\/p>\n However, from an operational standpoint, due to the number of design redundancies (and considering the number of failure to be accumulated), those scenarios remain extremely unlikely<\/span>.<\/p>\n","protected":false},"excerpt":{"rendered":" \u5728 A320 \u548c A350 \u7684\u895f\u7f1d\u7ffc\u5361\u963b\u4e0d\u6b63\u5e38\u7a0b\u5e8f\u4e2d\uff0c\u90fd\u6bd4\u8f83\u6e05\u695a\u5730\u8bf4\u660e\u4e86\u8981\u9009\u62e9\u901f\u5ea6\u6765\u653e\u6784\u578b\uff08\u6807\u9ec4\u90e8\u5206\uff09\uff0c\u4f46\u5bf9\u4e8e … \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-4110","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\/4110","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=4110"}],"version-history":[{"count":4,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/4110\/revisions"}],"predecessor-version":[{"id":4119,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/4110\/revisions\/4119"}],"wp:attachment":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/media?parent=4110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/categories?post=4110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/tags?post=4110"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=4110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2023\/05\/Manage-or-select-VAPP-when-slats-flaps-jammed_image_2.png\")
<\/a><\/p>\n\n
\n
\nQUOTE
\n\\- The flight crew should use the selected speed
\nUNQUOTE<\/p>\n
\n– For commonality<\/span> with A320 and A330 families, for which the use of selected speed is mandatory;
\n– It is technically possible to use managed speed, however, the flight crew would have to enter<\/span> the selected speed as Vapp in FMS and switch to managed speed when established at the approach speed that leading to heavy workload to the crew during the approach.
\n– In some scenarios<\/span>, the characteristic speeds may not be available. If they are not displayed on the PFD, the flight crew must use the selected speed.
\n– To fly the computed Vapp that will not be affected<\/span> by the Ground speed mini function. The computation of the Vapp in the case of Abnormal Slats\/Flaps Configuration ensures adequate speed margin against VLS and sufficient ground clearance to avoid a tail strike.<\/span><\/p>\n