固定反推保留失效锁销的托板螺母损坏
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<span style="color: #000000;white-space-collapse: preserve;">天气冷了，啥奇怪的故障都出现了，比如反推故障保留锁反推都出现问题了……</span><br/>
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<span style="font-size: 15px;color: #d92142;">▲</span><span style="font-size: 15px;">右反推内侧上部失效锁销的固定托板螺母损坏</span>
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<strong>1</strong>
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<strong>事件背景</strong>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">某737-800飞机，短停机组反映反推故障，EAU上查看代码为收上故障S839+V148+V150：</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">RESET以后，操作反推变为稳定的收上故障代码V148+V150，无法清除。<br/></span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">收上代码V148+V150 无法RESET表示反推在收上位时，同步锁一直有电，处于解锁状态。<br/></span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">准备参考MEL 78-01-03保留放行，但是在安装锁销时，维修人员发现内侧上部的锁销无法安装，一直打转。</span>
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<strong>问题分析</strong>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">同样的问题，其实在这篇文章已经提到过了：</span><a target="_blank" href="http://mp.weixin.qq.com/s?__biz=MzAwNzkyMTg1Mg==&mid=2247515350&idx=1&sn=b2dcad3a6df62c570b0919ad6c4e2c43&chksm=9b743505ac03bc1397d02e6c56e09f135eda65ba8b669aba396645bff0cb5f92f1642296b56c&scene=21#wechat_redirect" textvalue="失效反推可以少插一个销子吗？" linktype="text" imgurl="" imgdata="null" data-itemshowtype="11" tab="innerlink" style="font-size: 15px;letter-spacing: 0.544px;text-indent: 0em;" data-linktype="2">失效反推可以少插一个销子吗？</a>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">所以基本上判断应该就是托板螺母坏了。马上联系了文章的作者靳工，了解他们当时的情况。现场维修人员也找到损坏的托板螺母，两边固定的接耳都已经断了：</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">托板螺母在IPC 78-31-05-01：</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">BACN10JR6CFD实物如下，但是由于其在后格栅支撑环上，接近困难：</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">托板螺母的安装可以参考工程图纸：</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">参考737NG-FTD-78-13001：</span>
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The two deactivation pins in each thrust reverser half are installed in nut plates that are attached in the aft cascade support ring. Operators have reported occasionally finding nuts that spin in the nut plates. The spinning nuts either prevent installation and proper torquing of the deactivation pins, or prevent removal of the deactivation pins. The spinning nuts are due to<span style="color: #000000;"><strong>application of excessive torque on the deactivation pins or insufficient anti-seize lubrication on the threads of the deactivation pins and nut plates</strong></span>.
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">厂家分析认为，反推锁定销安装时的力矩过大或锁定销和托板螺母螺纹的防咬润滑不足是导致托板螺帽损坏的原因。</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">厂家建议航空公司定期检查，使用NSBT-8N防咬油润滑锁销和托板螺母螺纹。</span>
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<strong>维护提示</strong>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;"><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">1、</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">建议每次</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">安装</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">锁定销时，在</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">螺纹上</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">均匀</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">涂抹</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">NSBT-8N</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">防咬剂</span><span style="color: #3f3f3f; font-size: 15px; letter-spacing: 0.544px; white-space: pre-line; background-color: #ffffff;">覆盖全部螺纹。</span></span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">2、平时安装反推失效锁销时，严格按AMM手册要求的力矩安装。</span>
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<span draggable="true" style="color: #3f3f3f; font-size: 15px; text-decoration-style: solid; text-decoration-color: #3f3f3f;">3、如果发现锁定销无法对正锁定孔，可以通过反推人工收放程序人工作动反推，微调反推整流罩的位置，确保锁定销对正锁定孔。不能野蛮施工安装未对正的锁定销，否则可能导致托板螺帽损坏。</span>
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<span style="color: #363636;background-color: #ffe750;"><strong>推荐阅读：</strong></span>
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<a target="_blank" href="http://mp.weixin.qq.com/s?__biz=MzAwNzkyMTg1Mg==&mid=2247518665&idx=1&sn=52ae2736b12bcd457592a04459c5f620&chksm=9b74001aac03890c7856997fee8bd9c40c0e5bff176d1172ce17f4024204dcf356ef4e1b5023&scene=21#wechat_redirect" textvalue="维护提示｜后缘襟翼船型整流罩后锥螺钉缺失" linktype="text" imgurl="" imgdata="null" data-itemshowtype="0" tab="innerlink" data-linktype="2">维护提示｜后缘襟翼船型整流罩后锥螺钉缺失</a><br/>
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</section>
</section>
<p style="margin-right: 16px; margin-left: 16px; padding-right: 0em; padding-left: 0em; letter-spacing: 0.578px; text-wrap: wrap;">
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</p>
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<section class="_editor">
<section class="_editor" data-id="89428" style="border-width: 0px;border-style: none;border-color: initial;">
<section style="text-align: center;height: 50px;">
<section style="margin-right: auto; margin-left: auto; width: 48px; height: 48px; color: #ffffff; line-height: 48px; display: inline-block; background-image: url("https://newcdn.96weixin.com/mmbiz.qlogo.cn/mmbiz_gif/yqVAqoZvDibElUrxgDE4QeKBff3ehKBcxKdGhmMbTCFtF1y4BYviab1IbDHuSvqYyrFUFdicSOrOMABzH2nfYVm0A/640?wx_fmt=gif"); background-repeat: no-repeat; background-size: 100%; background-position: 0px center; background-color: #ffffff;">
<p style="font-weight: bold;">
完
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</section>
<section style="margin-top: -26px;height: 2px;background-color: #222121;">
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以学习
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