{"id":5178,"date":"2025-11-19T22:48:05","date_gmt":"2025-11-19T14:48:05","guid":{"rendered":"https:\/\/caucanimax.com\/blog\/?p=5178"},"modified":"2025-11-19T23:02:28","modified_gmt":"2025-11-19T15:02:28","slug":"the-issue-where-flex-can-still-be-calculated-under-degraded-takeoff-performance-calculation-conditions","status":"publish","type":"post","link":"https:\/\/caucanimax.com\/blog\/the-issue-where-flex-can-still-be-calculated-under-degraded-takeoff-performance-calculation-conditions\/","title":{"rendered":"\u8d77\u98de\u6027\u80fd\u8ba1\u7b97\u964d\u7ea7\u60c5\u51b5\u4e0b\u4ecd\u7136\u80fd\u7b97\u51faFLEX\u7684\u95ee\u9898"},"content":{"rendered":"

\u8ba1\u7b97\u8d77\u98de\u6027\u80fd\u65f6\uff0c\u5982\u679c\u540c\u4e00\u65f6\u95f4\u540c\u4e00\u62a5\u6587\u6216\u8005\u4e0d\u540c\u8d44\u6599\u4e2d\u7684\u201c\u8dd1\u9053\u6c61\u67d3\u7269\u7c7b\u578b+\u6df1\u5ea6\u201d\u548c\u201cRWYCC\u201d\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u6309\u7167\u201c\u964d\u7ea7\u201d\u5904\u7406\u3002\u5982\u679c Flysmart \u4e2d\u6709\u201c\u8dd1\u9053\u6c61\u67d3\u7269\u7c7b\u578b+\u6df1\u5ea6\u201d\u548c\u201cRWYCC\u201d\u53cc\u8f93\u5165\uff0c\u90a3\u4e48\u9700\u8981\u5728 RWYCC \u4e2d\u9009\u62e9\u76f8\u5e94\u7684\u6570\u503c\uff0c\u800c\u4e0d\u662f\u9009\u62e9\u201cNONE\u201d\u3002<\/p>\n

\u4f46\u6709\u4e00\u4e2a\u5947\u602a\u7684\u60c5\u51b5\uff0c\u5982\u679c\u8dd1\u9053\u6761\u4ef6\uff08RWY COND\uff09\u4e3a\u6e7f\uff08Wet\uff09\uff0c\u5e76\u4e14\u5b58\u5728\u964d\u7ea7\u60c5\u51b5\uff08\u5373\u4f7f\u964d\u5230 1-Poor\uff09\u65f6\uff0c\u5c31\u7b97\u5728 RWYCC \u8f93\u5165\u964d\u7ea7\u540e\u7684\u6570\u503c\uff0c\u8ba1\u7b97\u7ed3\u679c\u4ecd\u7136\u53ef\u4ee5\u4f7f\u7528 FLEX\u3002\u4f46\u8fd9\u79cd\u60c5\u51b5\u5982\u679c\u89c6\u4e3a\u6c61\u67d3\u8dd1\u9053\uff0c\u4e0d\u662f\u5e94\u8be5\u53ea\u80fd TOGA \u4e48\uff1f<\/p>\n

\"\"<\/a><\/p>\n

<\/p>\n

\u4ece\u4e0b\u9762\u51e0\u5f20\u56fe\u4e2d\u7684\u8ba1\u7b97\u7ed3\u679c\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u201cRWY COND WET + RWYCC 3 + TOGA\u201d \u548c \u201cRWY COND Dry snow 10mm + RWYCC NONE + TOGA\u201d \u7684\u6027\u80fd\u51e0\u4e4e\u76f8\u540c\u3002\u800c\u5982\u679c\u4f7f\u7528 \u201cRWY COND WET + RWYCC 3 + FLEX\u201d\uff0c\u901f\u5ea6\u4f1a\u9ad8\u5f97\u591a\uff0c\u4e14\u505c\u6b62\u4f59\u5ea6\u4ec5\u4e3a 69 \u7c73\u3002<\/p>\n

\u8fd9\u610f\u5473\u7740\u5728\u8fd9\u79cd\u964d\u7ea7\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528 TOGA \u624d\u80fd\u83b7\u5f97\u5408\u7406\u7684\u6027\u80fd\u3002\u5982\u679c\u6309\u7167 Flysmart \u964d\u7ea7\u7b97\u51fa\u6765\u7684 FLEX\uff0c\u88d5\u5ea6\u975e\u5e38\u5c0f\u3002\u8fd9\u4e5f\u4e0e\u6cd5\u89c4\u8981\u6c42\u201c\u6c61\u67d3\u8dd1\u9053\u5fc5\u987b\u4f7f\u7528 TOGA \u8d77\u98de\u201d\u4e00\u81f4\u3002<\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a> \"\"<\/a><\/p>\n

\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\uff0c\u7a7a\u5ba2\u7684\u89e3\u91ca\u662f\uff1a<\/p>\n

\u5728\u6027\u80fd\u5de5\u5177\uff08Flysmart + \u8d77\u98de\uff09\u4e2d\u5f15\u5165\u8dd1\u9053\u6761\u4ef6\u4ee3\u7801\uff08RWYCC\uff09\u7684\u76ee\u7684\uff0c\u662f\u4e3a\u4e86\u5728\u8d77\u98de\u6027\u80fd\u8ba1\u7b97\u4e2d\u7eb3\u5165 RWYCC \u7684\u8003\u91cf\u3002<\/p>\n

\u5728\u8fd0\u884c\u4e2d\uff0c\u6027\u80fd\u5de5\u5177\u4f1a\u8003\u8651\u8fd9\u4e2a\u65b0\u8f93\u5165\uff0c\u4f46\u5176\u5fc5\u987b\u4ecd\u7136\u7b26\u5408\u9002\u822a\u8ba4\u8bc1\u8981\u6c42\u3002\u76ee\u524d\uff0c\u5728\u9002\u822a\u8ba4\u8bc1\u5c42\u9762\uff0c\u8dd1\u9053\u72b6\u6001\uff08Runway State\uff09\u4ecd\u7136\u662f\u6027\u80fd\u8ba1\u7b97\u7684\u552f\u4e00\u4f9d\u636e\u3002<\/p>\n

Flysmart + \u5fc5\u987b\u9075\u5b88\u9002\u822a\u8ba4\u8bc1\u8981\u6c42\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 Flysmart + \u7684\u9650\u5236\u662f\u57fa\u4e8e\u8dd1\u9053\u72b6\u6001\u6765\u8bbe\u5b9a\u7684\u3002\u5982\u679c\u8dd1\u9053\u72b6\u6001\u5141\u8bb8\u4f7f\u7528\u7075\u6d3b\u6e29\u5ea6\uff08Flex Temperature\uff09\uff0c\u90a3\u4e48\u901a\u8fc7 RWYCC \u8fdb\u884c\u7684\u964d\u7ea7\u5e76\u4e0d\u4f1a\u9650\u5236 FLEX \u7684\u4f7f\u7528\u3002 \u9650\u5236\u7684\u6700\u7ec8\u8d23\u4efb\u4ecd\u7531\u98de\u884c\u673a\u7ec4\u627f\u62c5\u3002<\/strong><\/p><\/blockquote>\n

\u8bf4\u4eba\u8bdd\u5c31\u662f\uff0c\u7a7a\u5ba2\u60f3\u628a RWYCC \u7eb3\u5165\u8d77\u98de\u6027\u80fd\u8003\u91cf\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8f85\u52a9\u7684\u56e0\u7d20\uff0c\u5c24\u5176\u662f\u964d\u7ea7\u7684\u8ba1\u7b97\u3002\u4f46\u662f\u7531\u4e8e\u6cd5\u89c4\u8981\u6c42\u8d77\u98de\u6027\u80fd\u53ea\u80fd\u4f7f\u7528\u8dd1\u9053\u72b6\u6001\uff0c\u4e5f\u5c31\u662f\u201c\u8dd1\u9053\u6c61\u67d3\u7269\u7c7b\u578b+\u6df1\u5ea6\u201d\u6765\u8ba1\u7b97\uff08RWYCC \u662f\u7740\u9646\u6027\u80fd\u8ba1\u7b97\u4f7f\u7528\u7684\uff09\uff0c\u6240\u4ee5 Flysmart \u8ba1\u7b97\u8d77\u98de\u6027\u80fd\u65f6\u5e76\u4e0d\u4f1a\u56e0\u4e3a RWYCC \u800c\u6539\u53d8\u63a8\u529b\u7684\u9009\u62e9\u3002<\/p>\n

\u6240\u4ee5\u8fd9\u4e2a\u4e8b\u60c5\u5c31\u663e\u5f97\u5f88\u62e7\u5df4\uff0c\u6700\u540e\u5c31\u53d8\u6210\u4e86\u4e00\u4e2a\u5751\uff0c\u9700\u8981\u673a\u7ec4\u81ea\u5df1\u53bb\u907f\u5f00\uff0c\u6709\u70b9\u626f\u6de1\u4e86\u3002<\/p>\n

\n

\u539f\u6587<\/strong><\/p>\n

Q1<\/strong><\/p>\n

When there’s downgradetion in T.O PERF computation, if dual input is available, the T.O. THRUST can be FLEX. However, if the equivalent runway condition is input, only TOGA can be selected, because of FLEX takeoff is not permitted on contaminated runways.<\/p>\n

Is it a bug for T.O PERF app?<\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a><\/p>\n

A1<\/strong><\/p>\n

Apologize for the delay of the answer. The thrust option in\u00a0Flysmart+ takeoff modules is based on the runway state. Takeoff on a contaminated runway does not permit the use of FLEX. Therefore,\u00a0Flysmart+ only provides TOGA as a thrust selection when the RWY COND input is contaminated runway. When the RWY COND is Dry or Wet, any downgrade using RWYCC does not restrict the use of FLEX.<\/p>\n

In the example that CSC provides, the RWY COND is Dry Snow 10 mm, therefore takeoff using FLEX is not permitted.<\/p>\n

Q2<\/strong><\/p>\n

I agree with you about only TOGA when takeoff on a contaminated runway. My point is when RWY OCND is wet and there is a downgraded situation (even to 1-Poor), why can Flysmart still use FLEX? Should it be considered as contaminated runway? I think it is more reasonable to do so.<\/p>\n

Through the pics in attachment, you can see the performance are almost the same between “RWY COND WET + RWYCC 3 + TOGA” and “RWY COND Dry snow 10mm + REYCC NONE + TOGA”. And if “RWY COND WET + RWYCC 3 + FLEX”, the speed are much higher and stop margin only 69m. That means in such downgraded situation, use TOGA can get the reasonable performance.<\/p>\n

\"\"<\/a> \"\"<\/a> \"\"<\/a><\/p>\n

 <\/p>\n

A2<\/strong><\/p>\n

The aim of the introduction of the runway condition codes (RWYCC) in the performance tools (Flysmart+ takeoff) is to provide a way to consider the RWYCC in the takeoff performance.<\/p>\n

Operationally, the performance tools take into account this new input but it must remain compliant with the certification requirements. Currently for the certification, the runway state remains the only input for the performance computations.<\/p>\n

Flysmart+ must comply with the certification requirements. It is the reason that the limitations in Flysmart+ are taken into account based on the runway state. If the runway state permits to use flexible temperature, the downgrade via a RWYCC will not limit the use of the Flex<\/strong>. This limitation remains under flight crew responsibility.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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