{"id":3566,"date":"2020-07-30T22:26:23","date_gmt":"2020-07-30T14:26:23","guid":{"rendered":"http:\/\/caucanimax.com\/blog\/?p=3566"},"modified":"2020-07-30T22:26:24","modified_gmt":"2020-07-30T14:26:24","slug":"levels-of-fuel-system-clogged-of-a350","status":"publish","type":"post","link":"https:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/","title":{"rendered":"A350 \u53d1\u52a8\u673a\u71c3\u6cb9\u7cfb\u7edf\u5835\u585e\u7684\u51e0\u4e2a\u5c42\u7ea7"},"content":{"rendered":"<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_25\/\" rel=\"attachment wp-att-3567\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3567\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_25.png\" alt=\"\" width=\"528\" height=\"498\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_25.png 528w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_25-300x283.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_25-150x141.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_25-400x377.png 400w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><\/a><\/p>\n<p>\u4e0e\u53d1\u52a8\u673a\u71c3\u6cb9\u7cfb\u7edf\u5835\u585e\u76f8\u5173\u7684\u6709\u4ee5\u4e0b\u51e0\u4e2a\u8b66\u544a\uff1a<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1+2 FUEL HEAT EXCHANGER IN BYPASS -FUEL CONTAMINATED<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1(2) FUEL HEAT EXCHANGER IN BYPASS -FUEL CONTAMINATED<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1+2 FUEL FILTER CLOGGED<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1(2) FUEL FILTER CLOGGED<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1(2) FUEL FILTER IN BYPASS<\/p>\n<p><span style=\"text-decoration: underline;\">ENG<\/span> 1+2 FUEL FILTER IN BYPASS<\/p>\n<p><!--more--><\/p>\n<p>\u6700\u5f00\u59cb\u54a8\u8be2\u7a7a\u5ba2\u7684\u95ee\u9898\u662f\u5173\u4e8e\u4e3a\u4ec0\u4e48 ENG 1(2) FUEL FILTER CLOGGED \u53ea\u4f1a\u5728\u4f4e\u538b\u6cb9\u6ee4\u5835\u585e\uff0c\u4e14\u53e6\u4e00\u53f0\u53d1\u52a8\u673a\u51fa\u73b0 ENG 2(1) FAIL \u65f6\u624d\u4f1a\u89e6\u53d1\u3002\u5728\u540e\u7eed\u7684\u56de\u590d\u4e2d\uff0c\u9010\u6e10\u5bf9\u71c3\u6cb9\u7cfb\u7edf\u6c61\u67d3\u548c\u5835\u585e\u6709\u4e86\u66f4\u6df1\u4e00\u6b65\u7684\u4e86\u89e3\uff0c\u6240\u4ee5\u672c\u6587\u5c31\u5bf9\u6b64\u8fdb\u884c\u4e86\u4e00\u4e9b\u603b\u7ed3\u3002<\/p>\n<p><strong>\u4e00\u3001\u76f4\u63a5\u770b\u7ed3\u8bba\uff1a<\/strong><\/p>\n<p>1 \u4f4e\u538b\u6cb9\u6ee4\u5835\u585e\u4f1a\u9020\u6210\u7684 DISPATCH \u4fe1\u606f\u4ee5\u53ca ECAM \u8b66\u544a\u6309\u7167\u4e25\u91cd\u7a0b\u5e8f\u4ece LEVEL 1-5\uff085\u6700\u4e25\u91cd\uff09\uff1a<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_27\/\" rel=\"attachment wp-att-3570\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3570\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_27.png\" alt=\"\" width=\"680\" height=\"414\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_27.png 680w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_27-300x183.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_27-150x91.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_27-400x244.png 400w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/a><\/p>\n<p>2 \u71c3\u6cb9\u6c61\u67d3\u540c\u65f6\u8fd8\u4f1a\u5f71\u54cd\u5176\u4ed6\u7cfb\u7edf\uff0c\u6bd4\u5982 Fuel\/Oil Heat Exchanger\uff08FOHE\uff09\u3002\u6240\u6709\u8b66\u544a\u51fa\u73b0\u7684\u987a\u5e8f\u53ef\u80fd\u4f1a\u662f\uff1a<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_28\/\" rel=\"attachment wp-att-3571\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3571\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_28.png\" alt=\"\" width=\"629\" height=\"291\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_28.png 629w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_28-300x139.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_28-150x69.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_28-400x185.png 400w\" sizes=\"auto, (max-width: 629px) 100vw, 629px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u4e8c\u3001\u8be6\u7ec6\u8bf4\u660e\uff1a<\/strong><\/p>\n<p>\u71c3\u6cb9\u9996\u5148\u7ecf\u8fc7 FOHE\uff0c\u6240\u4ee5\u5982\u679c\u88ab\u6c61\u67d3\uff0c\u4f1a\u5148\u5f15\u8d77 FOHE \u7684\u8b66\u544a\u3002\u5176\u4e2d\u5355\u4fa7\u7684\u8b66\u544a\u53ea\u5728\u53e6\u4e00\u53d1\u5931\u6548\u7684\u60c5\u51b5\u4e0b\u89e6\u53d1\u3002\u5176\u5b9e\u5bf9\u6bd4\u5c31\u4f1a\u53d1\u73b0\uff0c ENG 1(2) FUEL HEAT EXCHANGER IN BYPASS -FUEL CONTAMINATED \u548c ENG 1+2 FUEL HEAT EXCHANGER IN BYPASS -FUEL CONTAMINATED \u7684\u7a0b\u5e8f\u662f\u5b8c\u5168\u4e00\u6837\u7684\u3002<\/p>\n<p>\u7136\u540e\u71c3\u6cb9\u4f1a\u7ecf\u8fc7 LP FILTER\uff0c\u5c31\u4f1a\u6709\u4e00\u7cfb\u5217\u53ef\u80fd\u51fa\u73b0\u7684\u653e\u884c\u4fe1\u606f\u548c ECAM \u8b66\u544a\u3002\u76f8\u6bd4 HEAT EXCHANGER\uff0c\u8fd9\u91cc\u5c31\u6709\u53e6\u4e00\u79cd\u8b66\u544a\uff0cENG 1+2 FUEL FILTER CLOGGED \u548c ENG 1(2) FUEL FILTER CLOGGED\uff0c\u540c\u6837\uff0c\u5355\u4fa7\u8b66\u544a\u53ea\u5728\u53e6\u4e00\u53d1\u5931\u6548\u7684\u60c5\u51b5\u4e0b\u89e6\u53d1\uff0c\u800c\u7a0b\u5e8f\u5b8c\u5168\u4e00\u6837\u3002\u5728 triggering condition \u4e2d\u6709\u53e5\u8bdd \u201cThis is the intermediary clogging threshold of the LP fuel filter.\u201d \u6240\u8c13\u201cintermediary clogging threshold\u201d \u5c31\u662f\u4e2d\u7b49\u7a0b\u5ea6\u5835\u585e\u7684\u60c5\u51b5\u4e0b\u4f1a\u89e6\u53d1\uff0c\u56e0\u4e3a\u6b64\u65f6\u71c3\u6cb9\u8fd8\u662f\u4f1a\u7ecf\u8fc7 FILTER\uff0c\u4e0d\u662f\u8d70 BYPASS\u3002\u800c\u5982\u679c\u5835\u5f97\u5728\u4e25\u91cd\u4e00\u4e9b\u5fc5\u987b\u8d70 BYPASS \u4e86\uff0c\u624d\u4f1a\u89e6\u53d1\u6700\u4e25\u91cd\u7684\u7684 ENG 1(2) FUEL FILTER IN BYPASS \u548c ENG 1+2 FUEL FILTER IN BYPASS \u8b66\u544a\u3002<\/p>\n<p>\u6709\u610f\u601d\u7684\u662f\uff0c\u5bf9\u6bd4\u4e0a\u8ff0\u6240\u6709\u8b66\u544a\uff0c\u4e0d\u7ba1\u662f FOHE \u8fd8\u662f FILTER\u7684\uff0c\u7a0b\u5e8f\u57fa\u672c\u90fd\u4e00\u6837\uff0c\u90fd\u662f\u8981\u6c42\u5173\u95ed\u71c3\u6cb9\u4ea4\u8f93\u548c\u4e2d\u592e\u6cb9\u7bb1\u6cf5\uff0c\u4e25\u91cd\u7684\u60c5\u51b5\u5c31\u518d\u6709\u4e00\u4e2a\u5173\u95ed\u81ea\u52a8\u63a8\u529b\u3002\u5982\u679c\u4e00\u4e2a\u63a5\u4e00\u4e2a\u89e6\u53d1\uff0c\u90a3\u57fa\u672c\u4e0a\u5728 FOHE \u5835\u585e\u65f6\uff0c\u8be5\u505a\u7684\u5c31\u90fd\u505a\u4e86\u3002\u7a7a\u5ba2\u89e3\u91ca\u8bf4\uff0c\u5176\u5b9e\u5728\u7cfb\u7edf\u5c42\u9762\uff0c\u6cb9\u6ee4\u5835\u585e\u7684\u95ee\u9898\u4e0d\u5927\uff0c\u56e0\u4e3a\u6700\u7ec8\u90fd\u4f1a\u8d70 BYPASS\u3002\u800c\u5982\u679c\u9047\u5230\u5047\u8b66\u544a\u6216\u8005 BYPASS \u6545\u969c\uff0c\u673a\u7ec4\u4e5f\u65e0\u6cd5\u76f4\u63a5\u505a\u4ec0\u4e48\u6765\u89e3\u51b3\u95ee\u9898\u3002\u6240\u4ee5\u673a\u7ec4\u80fd\u505a\u7684\u5c31\u53ea\u6709\u5c3d\u65e9\u907f\u514d\u4ea4\u8f93\u4f9b\u6cb9\u5bfc\u81f4\u66f4\u4e25\u91cd\u7684\u5835\u585e\uff0c\u4ec5\u6b64\u800c\u5df2\u3002<\/p>\n<p>\u518d\u56de\u5230\u6700\u65e9\u54a8\u8be2\u7a7a\u5ba2\u7684\u90a3\u4e2a\u95ee\u9898\uff1a\u4e3a\u4ec0\u4e48 ENG 1(2) FUEL FILTER CLOGGED \u53ea\u4f1a\u5728\u4f4e\u538b\u6cb9\u6ee4\u5835\u585e\uff0c\u4e14\u53e6\u4e00\u53f0\u53d1\u52a8\u673a\u51fa\u73b0 ENG 2(1) FAIL \u65f6\u624d\u4f1a\u89e6\u53d1\uff1f\u867d\u7136\u7a7a\u5ba2\u6ca1\u6709\u76f4\u63a5\u56de\u7b54\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u4ece\u4e0a\u9762\u63d0\u5230\u7684\u7a0b\u5e8f\u5185\u5bb9\u7684\u9ad8\u5ea6\u76f8\u4f3c\u751a\u81f3\u76f8\u540c\uff0c\u4ee5\u53ca\u7a7a\u5ba2\u5bf9\u6cb9\u6ee4\u5835\u585e\u7684\u8bf4\u660e\u6765\u770b\uff0c\u65e2\u7136\u7a0b\u5e8f\u5b8c\u5168\u4e00\u6837\uff0c\u5c31\u6ca1\u5fc5\u8981\u8bbe\u7f6e\u4e24\u4e2a\u4e86\u3002\u5f53\u7136\uff0c\u4f1a\u53d1\u73b0 ENG 1(2) FUEL FILTER IN BYPASS \u548c ENG 1+2 FUEL FILTER IN BYPASS \u786e\u5b9e\u5728\u6ca1\u6709 ENG 2(1) FAIL \u8b66\u544a\u7684\u60c5\u51b5\u90fd\u53ef\u4ee5\u89e6\u53d1\u7684\uff0c\u4f46\u5176\u5b9e ENG 1(2) FUEL FILTER IN BYPASS \u7684\u7a0b\u5e8f\u5c31\u53ea\u6709\u5173\u95ed\u4ea4\u8f93\u4f9b\u6cb9\uff0c\u5b9e\u9645\u4e0a\u5728\u4e4b\u524d\u7684\u8b66\u544a\u4e2d\u5c31\u5df2\u7ecf\u5173\u4e86\uff0c\u6240\u4ee5\u8fd9\u4e2a\u8b66\u544a\u57fa\u672c\u4e0a\u53ef\u4ee5\u7b97\u662f\u4e00\u4e2a\u63d0\u9192\uff0c\u4e2a\u4eba\u89c9\u5f97\u4e5f\u662f\u53ef\u6709\u53ef\u65e0\u5427\u3002<\/p>\n<p>\u5728\u8fd9\u4e4b\u540e\u71c3\u6cb9\u6c61\u67d3\u8fd8\u4f1a\u5f15\u8d77\u7684\u95ee\u9898\u5728 ENG 1+2 FUEL HEAT EXCHANGER IN BYPASS -FUEL CONTAMINATED \u7684\u7a0b\u5e8f\u8bf4\u660e\u4e2d\u6709\u63d0\u5230\uff1a<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_26\/\" rel=\"attachment wp-att-3575\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3575\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_26.png\" alt=\"\" width=\"670\" height=\"447\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_26.png 670w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_26-300x200.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_26-150x100.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_26-400x267.png 400w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u4e09\u3001\u5177\u4f53\u8bf7\u53c2\u8003 TechRequest \u539f\u6587\uff1a<\/strong><\/p>\n<p><strong>Q: ENG 1(2) FUEL FILTER CLOGGED<\/strong><br \/>\nWhy this alert is triggered only when the ENG 2(1) FAIL ECAM alert is triggered on the opposite engine? If now only one eng fuel filter is clogged because of corresponding wing tank contamination without eng failure, according to current triggering condition, neither of ENG 1(2) FUEL FILTER CLOGGED and ENG 1+2 FUEL FILTER CLOGGED will be triggered. Is it resonable?<\/p>\n<p><strong>A:<\/strong><br \/>\nWe would like to confirm that as mentioned in your message (and as described in the FCOM PRO-ABN-ENG-7331W150 Triggering Conditions), the alert ENG 1(2) FUEL FILTER CLOGGED is displayed to the crew only when another failure is detected on the opposite engine side (ENG 2(1) FAIL ECAM).<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_24\/\" rel=\"attachment wp-att-3572\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3572\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24.png\" alt=\"\" width=\"1210\" height=\"429\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24.png 1210w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24-300x106.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24-1024x363.png 1024w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24-768x272.png 768w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24-150x53.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_24-400x142.png 400w\" sizes=\"auto, (max-width: 1210px) 100vw, 1210px\" \/><\/a><\/p>\n<p>As per design, if a contamination starts to clog the Low Pressure (LP) fuel filter, the <strong>first level<\/strong> of the LP fuel filter monitoring function will trig the <strong>DM<\/strong> ENG 1(2) FUEL FILTER <strong>PARTLY<\/strong> CLOGGED (dispatch allowed for <strong>30 flight hours<\/strong>).<br \/>\nIn the case of a more severe contamination, the <strong>second level<\/strong> of the LP fuel filter monitoring will then lead the EEC to emit the message ENG 1(2) FUEL FILTER CLOGGED on DISPATCH page to indicate an impending Low Pressure fuel filter blockage and that the associated LP fuel bypass valve is not open.<br \/>\nWhereas this situation requests maintenance before next flight (DM ENG 1(2) FUEL FILTER CLOGGED is NO GO), it does not require immediate action from the crew in flight.<\/p>\n<p>Indeed, at system level, a fuel filter clogged is not supposed to have any effect since the fuel flow should ultimately go through the bypass valve (third threshold of the LP fuel filter monitoring reported through the ENG 1(2) FUEL FILTER IN BYPASS alert).<\/p>\n<p>It must then be noted that:<\/p>\n<ul>\n<li>In the case of a spurious alert or a failed bypass, <strong>nothing<\/strong> can be directly done by the crew to recover the issue and no action is required in flight,<\/li>\n<li>If the contamination is limited to <strong>one engine<\/strong>, the ECAM actions associated with alert ENG 1(2) FUEL FILTER IN BYPASS will be applicable (see answer 3),<\/li>\n<li>The ENG 1(2) FUEL FILTER CLOGGED alert will be displayed on the WD with a LAND ANSA procedure when another failure is detected on the opposite engine side to request the crew to set to OFF both the crossfeed valves and the center tank pumps. The purpose of the procedure is to <strong>limit the impact of a cross contamination<\/strong> on the remaining engine.<\/li>\n<\/ul>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_29\/\" rel=\"attachment wp-att-3573\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3573\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29.png\" alt=\"\" width=\"1019\" height=\"484\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29.png 1019w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29-300x142.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29-768x365.png 768w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29-150x71.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_29-400x190.png 400w\" sizes=\"auto, (max-width: 1019px) 100vw, 1019px\" \/><\/a><\/p>\n<p><strong>Q_2:<\/strong><br \/>\nThanks for explanation of triggering sequence of those alert. As the level of contamination, the notification to crew is as follow:<\/p>\n<p><a href=\"http:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/some-questions-about-abnormal-procedure-_02_30\/\" rel=\"attachment wp-att-3574\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3574\" src=\"http:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_30.png\" alt=\"\" width=\"748\" height=\"324\" srcset=\"https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_30.png 748w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_30-300x130.png 300w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_30-150x65.png 150w, https:\/\/caucanimax.com\/blog\/wordpress\/wp-content\/uploads\/2020\/07\/Some-questions-about-abnormal-procedure-_02_30-400x173.png 400w\" sizes=\"auto, (max-width: 748px) 100vw, 748px\" \/><\/a><\/p>\n<p><strong>A2_2:<\/strong><br \/>\nWe confirm that the content of the table is correct.<\/p>\n<p>However, please note that the \u201c<strong>most severe contamination<\/strong>\u201d is indicated by the ENG 1+2 FUEL FILTER IN BYPASS message.<\/p>\n<p>Indeed, as mentioned in the annunciations section of the FCOM\/PRO\/ABN, the ENG 1+2 FUEL FILTER CLOGGED alert is displayed when both engines are contaminated and the intermediary clogging threshold is reached. Note that at this stage, the LP fuel filter bypass are still closed.<\/p>\n<p>If the contamination continues to progress and the bypass valves on both engines finally open, the ENG 1+2 FUEL FILTER IN BYPASS alert will then be displayed.<\/p>\n<p>As highlighted in the table, both ECAM procedures require LAND ANSA with Crossfeed valves and Center fuel tank set to OFF. In the <strong>most advanced scenario<\/strong> (i.e. ENG 1+2 FUEL FILTER IN BYPASS), it is then requested to the crew to set the A\/THR to OFF and to avoid rapid thrust changes in order to prevent both engines from stall.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0e\u53d1\u52a8\u673a\u71c3\u6cb9\u7cfb\u7edf\u5835\u585e\u76f8\u5173\u7684\u6709\u4ee5\u4e0b\u51e0\u4e2a\u8b66\u544a\uff1a ENG 1+2 FUEL HEAT EXCHANGER IN BY &#8230; <a title=\"A350 \u53d1\u52a8\u673a\u71c3\u6cb9\u7cfb\u7edf\u5835\u585e\u7684\u51e0\u4e2a\u5c42\u7ea7\" class=\"read-more\" href=\"https:\/\/caucanimax.com\/blog\/levels-of-fuel-system-clogged-of-a350\/\" aria-label=\"\u9605\u8bfb A350 \u53d1\u52a8\u673a\u71c3\u6cb9\u7cfb\u7edf\u5835\u585e\u7684\u51e0\u4e2a\u5c42\u7ea7\">\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-3566","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\/3566","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=3566"}],"version-history":[{"count":4,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3566\/revisions"}],"predecessor-version":[{"id":3577,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/posts\/3566\/revisions\/3577"}],"wp:attachment":[{"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/media?parent=3566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/categories?post=3566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/tags?post=3566"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/caucanimax.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=3566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}