ryn_82 发表于 2023-12-15 11:25:18

维护提示 | 故障代码76-X136Y排故

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                            <span style="color: #000000;white-space-collapse: preserve;">作为技术支援工程师，碰到故障时，一定要参考系统原理给出自己的方案，而不是简单的参考FIM，否则失去了技术支援的价值。
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            <span style="font-size: 15px;color: #D92142;">▲</span> &nbsp; &nbsp; &nbsp;<span style="font-size: 15px;">右发故障代码76-31362
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    <span style="font-size: 15px;">对于发动机故障代码，不要以为修复时限为LONG TIME、ECONOMIC的故障就不重要。
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                        <strong style="outline: 0px;">1
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                <strong style="outline: 0px;">事件背景
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">某737-800飞机，外站航后EEC BITE发现故障代码76-31362：
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">导致此代码的原因是EEC发现起动手柄通道A继电器和通道B继电器的信号不一致。
    <mpchecktext contenteditable="false" id="1702598060514_0.6205773220606761"></mpchecktext>让当地机务帮忙查看INPUT MONITORING➡DISCRERES里3/3页的起动手柄信号：
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">CUTOFF位的手柄信号正常：
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   &nbsp; &nbsp; &nbsp;<span style="font-size: 15px; background-color: #FFFFFF; letter-spacing: 0.544px; text-indent: 0em; white-space-collapse: preserve-breaks; color: #D92142;">▲</span> &nbsp;<span style="color: #3F3F3F; font-size: 15px; background-color: #FFFFFF; letter-spacing: 0.544px; text-indent: 0em; white-space-collapse: preserve-breaks;">起动手柄CUTOFF位信号正常
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">初步判断为应该是IDLE位的信号有问题。
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">由于只有故障代码76-31362，没有出现以下现象：
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    <span style="outline: 0px;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;color: #D92142;">●&nbsp;</span> &nbsp;<span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">73-31352 Airplane Voltage Input to the EEC is Out of Range
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    <span style="letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF; outline: 0px; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3F3F3F; color: #D92142;">●&nbsp;</span> &nbsp;<span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">PSEU灯亮，PSEU测试有29-22001信息，液压油从B系统往A系统串油
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    <strong><span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">注：
    <mpchecktext contenteditable="false" id="1702598060524_0.5321962633904371"></mpchecktext>如果76-3136X同时出现上面这些现象，说明是A通道继电器的信号出现了问题。
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    <span draggable="true" style="outline: 0px;color: #3F3F3F;font-size: 15px;text-decoration-style: solid;text-decoration-color: #3F3F3F;">从原理上初步判断应该是B通道继电器的信号出现了问题。
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                        <strong style="outline: 0px;">2
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                <strong style="outline: 0px;">分析和排故
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">在C</span> &nbsp;<span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">DU上依次选择MAINT，ENGINE，ENGINE2，INPUT MONITORING 2/2，DISCRERES 3/3，右发起动手柄在CUTOFF和IDLE位分别拍照发给工程师：
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   &nbsp;<span style="font-size: 15px; letter-spacing: 0.544px; text-indent: 0em; background-color: #FFFFFF; white-space-collapse: preserve-breaks; text-align: justify; color: #D92142;">▲</span> &nbsp;<span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; text-indent: 0em; background-color: #FFFFFF; white-space-collapse: preserve-breaks; text-align: justify;">CUTOFF位起动手柄信号都在CUTOFF，正常
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">此页参数表明：
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    <span style="font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;color: #D92142;">●&nbsp;</span> &nbsp;<span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">在测试页面的右下角，ACT CH B，指的是EEC目前使用的或控制发动机的是B通道。
    <mpchecktext contenteditable="false" id="1702598060531_0.9632065247737247"></mpchecktext>GMM CH A，指的是地面维护模式或控制自检的是A通道。
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    <span style="letter-spacing: 0.544px;text-indent: 0em;font-size: 12px;color: #B2B2B2;">手册原话：
    <mpchecktext contenteditable="false" id="1702598060533_0.674634976199225"></mpchecktext>The ACT CH A shows the active channel or the channel that controls the engine. The GMM CH A shows the ground maintenance mode (GMM) channel or the channel that controls CDU BITE.
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"><span style="color: #D92142; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">●&nbsp;</span>STARTLEV SW-LOC表示GMM通道监控到的起动手柄位置。
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"><span style="color: #D92142; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">●&nbsp;</span>STARTLEV SW-XCH表示另外一个通道监控到的起动手柄位置。
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"><span style="color: #D92142; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">●&nbsp;</span>STARTLEVER-DEU1和START LEVER-DEU2表示DEU监控到的起动手柄的位置
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">DEU是通过R568（右发，左发是R566）的C组触点来获取起动手柄位置信息：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">EEC A通道通过R568（右发，左发是R566）的A组触点来获得起动手柄的位置信号，EEC B通道通过R567（<span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">右发，左发</span><span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">是R565</span>）的A组触点来获得起动手柄的位置信号：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">首先要判断手柄是IDLE还是CUTOFF位出现了信号问题，由于CUTOFF位没有问题，需要起动手柄放到IDLE位进行判断：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">右发手柄提到IDLE位前，拨出右发点火和燃油活门跳开关并挂警告牌：
    <mpchecktext contenteditable="false" id="1702598060541_0.009465393214793005"></mpchecktext>P6-2 D4和D6，P6-3 B3和E3：
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    <p style="text-align: left;padding: 0px 0.5em;">
         &nbsp; &nbsp;<span style="font-size: var(--articleFontsize); text-align: justify;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">将右发起动手柄从CUFOFF位移动至IDLE位，发现B通道信号异常：
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   &nbsp;<span style="font-size: 15px; letter-spacing: 0.544px; text-indent: 0em; white-space-collapse: preserve-breaks; text-align: justify; background-color: #FFFFFF; color: #D92142;">▲</span> &nbsp;<span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; text-indent: 0em; white-space-collapse: preserve-breaks; text-align: justify; background-color: #FFFFFF;">IDLE位XCH（除GMM外通道的，这里是B通道）的起动手柄信号在CUTOFF，故障
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">参考 AMM TASK 76-11-02-010-802-F00接近并脱开右发起动手柄导线束插头D11292（B通道，R567）和D11290（A通道，R568），测量起动手柄端的PIN 4、PIN5对PIN15的导通性，正常情况：
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    <span style="font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;color: #D92142;">●</span> &nbsp;<span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"> CUTOFF位：
    <mpchecktext contenteditable="false" id="1702598060547_0.8904122849529437"></mpchecktext>PIN 4-PIN15导通，PIN5-PIN15不导通
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<section style="margin-right: 8px; margin-left: 8px; text-indent: 0em; white-space: pre-line; outline: 0px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255); font-size: 18px; color: rgb(64, 64, 64); word-break: break-word; hyphens: auto; line-height: 2em;">
    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"><span style="letter-spacing: 0.544px; text-indent: 0em; white-space: pre-line; font-size: 15px; color: #D92142;">●&nbsp;</span><span style="letter-spacing: 0.544px; text-indent: 0em; white-space: pre-line; color: #3F3F3F; font-size: 15px;"></span>IDLE位：
    <mpchecktext contenteditable="false" id="1702598060549_0.5613522009994987"></mpchecktext>PIN 4-PIN15不导通，PIN5-PIN15导通
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<section style="margin-right: 8px; margin-left: 8px; text-indent: 0em; white-space: pre-line; outline: 0px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255); word-break: break-word; hyphens: auto; line-height: 2em;">
    <span style="color:#3f3f3f;"><span style="font-size: 15px;">测量发现IDLE位时D11292 PIN4-PIN15不导通（正常），PIN5-PIN15阻值168KΩ（正常要导通，故障），确定为起动手柄电门故障，更换后试车检查正常。
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                  <strong style="outline: 0px;">3
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            <strong style="outline: 0px;">维护提示
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">B通道起动手柄信号导致76-3136X故障，看似是不会造成任何异常反映，但是通过原理分析，不难看出，B通道起动手柄IDLE位信号，还控制IDG的脱开：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"></span>
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">像本案例中的故障情况，会导致即使右发起动手柄放到IDLE位，R567也一直在CUTOFF位，从而导致IDG脱开电磁线圈无法得电，IDG无法人工脱开：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;"></span>
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">这样一旦IDG故障需要脱开时，就会出现问题。
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">所以特别提醒大家：
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    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">1、遇到故障代码76-X136Y代码时，要尽快完成排故。
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<section style="margin-right: 8px; margin-left: 8px; text-indent: 0em; white-space: pre-line; outline: 0px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255); font-size: 18px; color: rgb(64, 64, 64); word-break: break-word; hyphens: auto; line-height: 2em;">
    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">2、排故前利用EEC BITE的INPUT MONITORING里对起动手柄信号的实时监控功能，可以快速判断故障目前是否存在、是IDLE位还是CUTOFF位故障、是EEC哪个通道的信号问题，比起直接按FIM要更精准。
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<section style="margin-right: 8px; margin-left: 8px; text-indent: 0em; white-space: pre-line; outline: 0px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255); font-size: 18px; color: rgb(64, 64, 64); word-break: break-word; hyphens: auto; line-height: 2em;">
    <span style="color: #3F3F3F;font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;">3、如果是间歇性故障，起动手柄IDLE和CUTOFF位EEC INPUT MONITORING里的位置信号都正常的话，可以通过故障现象来判断最可能是哪个通道的信号问题。
    <mpchecktext contenteditable="false" id="1702598060560_0.865505712289725"></mpchecktext>如果是手柄触点的话，会导致相应某个继电器给出的所有信号都出现问题；
    <mpchecktext contenteditable="false" id="1702598060561_0.6098930218620158"></mpchecktext>如果是继电器的话，可能是单组触点信号出现问题也可能是<span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">所有信号</span><span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">都出现</span><span style="color: #3F3F3F; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #FFFFFF;">问题。
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王志刚1 发表于 2023-12-17 10:21:03

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阿西吧2 发表于 2023-12-18 00:37:47

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