案例分享｜ CVR测试状态灯不亮B737系列机务在线

机务君 发表于 2023-6-28 16:07:19

案例分享｜ CVR测试状态灯不亮

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            <span style="max-width: 100%;line-height: 2em;color: #595959;white-space: pre-wrap;font-size: 12px;letter-spacing: 2.912px;overflow-wrap: break-word ;box-sizing: border-box ;">对于全世界只有不到</span><span style="max-width: 100%;line-height: 2em;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;"><strong style="max-width: 100%;overflow-wrap: break-word ;box-sizing: border-box ;"><span style="max-width: 100%;font-size: 12px;overflow-wrap: break-word ;box-sizing: border-box ;"><span style="max-width: 100%;color: #ab1942;overflow-wrap: break-word ;box-sizing: border-box ;">1 %</span><span style="max-width: 100%;color: #407600;overflow-wrap: break-word ;box-sizing: border-box ;"> </span></span></strong></span><span style="max-width: 100%;line-height: 2em;color: #595959;white-space: pre-wrap;font-size: 12px;letter-spacing: 2.912px;overflow-wrap: break-word ;box-sizing: border-box ;">的人关注了九品机务</span>
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         <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">前几年的一个冬天遇到好几次航前CVR测试时状态灯不亮的故障，当时对系统进行了学习和总结，自我感觉对系统原理已经足够了解，直到上个月遇到一次CVR测试状态灯不亮的故障，才对这个系统有了进一步的了解。。。</span>
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                     事件背景
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         <span style="font-family: 宋体;font-size: 14px;letter-spacing: 2px;background-color: #ffffff;"><span style="color: #888888;font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;"><br></span></span>
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         <span style="font-size: 14px;">2023年5月，一架NG飞机航前CVR测试状态灯不亮，复位跳开关无效，断开P18-2 D6 VOICE RCDR/RIPS跳开关后测试状态灯不亮，耳机中能听到环境音与测试谐音，检查CVR组件本体指示灯未点亮，重新插拔CVR无效，与其他飞机对串CVR组件无效，与其他飞机对串CVR控制面板无效，拆下RIPS电池无效，测量CVR控制面板D、E无电压，依据FIM测量RIPS维护点1、6之间电压在标准范围内，测量RIPS维护点1、10之间导通性异常，后续更换RIPS后测试正常，故障排除。</span>
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               系统原理
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   <span style="max-width: 100%;font-family: 宋体;font-size: 14px;letter-spacing: 2px;background-color: #ffffff;overflow-wrap: break-word ;box-sizing: border-box ;"><span style="max-width: 100%;color: #888888;font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;overflow-wrap: break-word ;box-sizing: border-box ;"><br></span></span>
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">RIPS——CVR独立供电组件，当飞机电源系统关闭或故障时，RIPS作为CVR的备用电源，使其能够继续工作10分钟。</span>
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   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE4Jz3mLIzHs2FLrO5aR3DIG5ibyUS2Ifk1bXVuw2PfGSSVXu4qLE0YyYw/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
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   <span style="color: #888888;font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;background-color: #ffffff;">▲RIPS电池可以单独更换，底座内部有监控、自检、充电等控制电路</span>
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">CVR的供电由VOICE RCDR RELAY和VOICE RCDR/RIPS两个跳开关控制，28V直流电经过VOICE RCDR/RIPS跳开关输入到RIPS，再由RIPS电源输出端经过MOAO RIPS Power Cutoff继电器后到达CVR。</span>
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   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE44iajIqLXzZIljLHUVRg6KvX8dyhdAmtmYVZzF0dGiaqAI7NHSUqHZ6zw/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">由图可知，当飞机在地面且双发均未启动时，如果CVR电门置于AUTO位，MOAO RIPS Power Cutoff继电器无法吸合，从而使CVR无电源输入。当以上任一条件满足时，MOAO RIPS Power Cutoff继电器得电吸合，使CVR得到28V直流电输入。</span>
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">飞机通电后，28V直流电经过VOICE RCDR/RIPS跳开关到达RIPS，开始给RIPS电池充电，同时28V直流电经过RIPS内部的旁通二极管直接到达RIPS输出端。</span>
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   <span style="font-size: 14px;letter-spacing: 0.034em;">当进行CVR测试时，需要确认CVR控制面板的绿色状态灯点亮，同时耳机能够听到测试谐音。</span>
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   <span style="font-size: 14px;letter-spacing: 0.034em;">通过SSM可知，CVR控制面板的收音MIC与耳机插孔供电逻辑由CVR控制。</span>
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   <span style="font-size: 14px;letter-spacing: 0.034em;">而CVR控制面板的状态灯的供电同时受CVR和RIPS控制。</span>
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               故障分析
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">对于本例中CVR测试时状态灯不亮，但耳机能听到谐音，由于RIPS故障，导致RIPS的D13185插头的Pin 11无法向CVR控制面板的发光二极管供电，从而无法点亮状态灯。</span>
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   <span style="max-width: 100%;font-size: 14px;overflow-wrap: break-word ;box-sizing: border-box ;">拆下RIPS电池故障依旧，同时根据AMM及FIM中对RIPS相应维护点的测量，可以确认RIPS底座故障，更换RIPS组件后故障排除。</span>
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            <p>
               维护提示
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   <span style="font-family: 宋体;font-size: 14px;letter-spacing: 2px;background-color: #ffffff;"><span style="color: #888888;font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;font-size: 12px;letter-spacing: 0.544px;text-align: left;"><br></span></span>
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<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;">1、RIPS内部有RIPS自检电路，用于监控RIPS内部功能，包括监控RIPS电池容量，以确定电池是否能够为CVR供电10分钟，当无法满足时，</span><span style="font-size: 14px;letter-spacing: 0.578px;">使</span><span style="font-size: 14px;letter-spacing: 0.578px;">R</span><span style="font-size: 14px;letter-spacing: 0.578px;">IPS</span><span style="font-size: 14px;letter-spacing: 0.578px;">的D13185插头的Pin 11无输出，故而无法点亮状态灯。</span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;"><span style="font-size: 14px;letter-spacing: 0.578px;"><br></span></span>
</p>
<p style="text-align: center;">
   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE4wAeicQ6M16GR6xve4kt25lbHcNwzBIJrcW0uCEBQFnnLApm8Ra25XCQ/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <br>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;">2、当遇到相关故障时，依据AMM或FIM对RIPS维护点的检查可以快速判断故障源，MP中对此工作也有相应的时限要求。由于RIPS电池性能受环境、温度、湿度等运行条件影响较大，RIPS更换频率相对较高。</span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;"><br></span>
</p>
<p style="text-align: center;">
   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE40NNNGKuYic8Qt1tF4taiaybe2ia1ZP4uP3TVewEIVo2tJqKicibN8G6pOAQ/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <br>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;">3、根据波音SR回复的内容，当</span><span style="font-size: 14px;letter-spacing: 0.578px;">CVR测试时状态灯不亮，但耳机内能够听到测试谐音与环境音时，可以测量RIPS维护点1、12之间的电阻，如果电阻小于100欧，则可以认为CVR系统正常。</span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;"><br></span>
</p>
<p style="text-align: center;">
   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE4up0kb05ROrmJW5EpsYARvJOH6kLPH9oXyUibUqXHr1t6wmfZ9aTVQQg/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;"></span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;">4、MEL中有保留RIPS的条目，也有保留RIPS电池的条目，由于CVR供电先经过RIPS再供给CVR，保留RIPS时需要断开RIPS跳开关，此时CVR因无供电而失效。根据局方规定，日常运行中很难依据此条目放行飞机。</span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;"><br></span>
</p>
<p style="text-align: center;">
   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE47zrCVQeiaDWLToa5pcnRcbauBk5tmUvPXibrTtOoe3BHIUSDiaYekR65w/640?wx_fmt=png" data-type="png" style="box-shadow: #b4b4b4 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <br>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;">而当RIPS电池故障时，需要拆下RIPS电池，此时进行CVR测试时状态灯正常点亮，耳机也能够听到测试谐音，对CVR系统没有任何影响。<br></span>
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <span style="font-size: 14px;letter-spacing: 0.578px;"><br></span>
</p>
<p style="text-align: center;">
   <img data-galleryid="" src="http://newcdn.96weixin.com/mmbiz.qlogo.cn/sz_mmbiz_png/7ayb1fm1g87MSnYGbsxLORNWOIxBXcE45FgwiccEtGD6EXe8EkMJoMFnfzdmLqxvy7eRiciaC2o2odWicDwwMF6KSQ/640?wx_fmt=png" data-type="png" style="box-shadow: #d2d2d2 0em 0em 0.5em 0px;font-size: 17px;width: 100%;height: auto;">
</p>
<p style="margin-bottom: 0px;letter-spacing: 0.578px;white-space: normal;">
   <br>
</p>
<section data-tools="新媒体排版" data-style-type="undefined" style="max-width: 100%;overflow-wrap: break-word ;box-sizing: border-box ;margin-bottom: 0px;" class="">
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         <strong style="max-width: 100%;overflow-wrap: break-word ;box-sizing: border-box ;">／End.</strong>
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dmsnobe 发表于 2023-9-3 20:15:34

你不是南航新疆的吧https://app.airacm.com/public/emotion/face_wulian.pnghttps://app.airacm.com/public/emotion/face_wulian.png

机务君 发表于 2023-9-4 17:10:17

dmsnobe 发表于 2023-09-03 20:15
你不是南航新疆的吧

不是啊

页: [1]

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案例分享 ｜ CVR测试状态灯不亮

案例分享｜ CVR测试状态灯不亮