737MAX机型PSEU监控的灯光故障信息对照表

737MAX的PSEU对自己输出的门警告灯、起落架红绿灯、起飞构型灯的线路都有监控,以判断指示是否工作正常。以下为对应的跳开关和位置,可作为查询参考。

代码如下,方便查询。

代码信息跳开关位置
31-56004PSEU TAKEOFF CONFIG LIGHT 1 CIRCUIT IS OPEN
OR SHORTED DURING TEST
C314P6-3E12
31-56005PSEU TAKEOFF CONFIG LIGHT 2 CIRCUIT IS OPEN
OR SHORTED DURING TEST
C318P6-3 F12
31-56104PSEU TAKEOFF CONFIG LIGHT 1 CIRCUIT IS OPEN
OR SHORTED AFTER TAKEOFF
C314P6-3 E12
31-56105PSEU TAKEOFF CONFIG LIGHT 2 CIRCUIT IS OPEN
OR SHORTED AFTER TAKEOFF
C318P6-3 F12
32-66001PSEU LEFT GEAR GREEN LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C317P6-3 F11
32-66002PSEU NOSE GEAR GREEN LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C317P6-3 F11
32-66003PSEU RIGHT GEAR GREEN LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C317P6-3 F11
32-66004PSEU LEFT GEAR RED LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
32-66005PSEU NOSE GEAR RED LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
32-66006PSEU RIGHT GEAR RED LIGHT 1 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
32-66011PSEU LEFT GEAR GREEN LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C1179P6-3 F13
32-66012PSEU NOSE GEAR GREEN LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C1179P6-3 F13
32-66013PSEU RIGHT GEAR GREEN LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C1179P6-3 F13
32-66014PSEU LEFT GEAR RED LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
32-66015PSEU NOSE GEAR RED LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
32-66016PSEU RIGHT GEAR RED LIGHT 2 CIRCUIT IS OPEN
OR SHORTED
C314P6-3 E12
52-76001PSEU EQUIPMENT DOORS WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76003PSEU AFT CARGO DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76004PSEU AFT ENTRY DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76005PSEU AFT SERVICE DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76014PSEU FORWARD CARGO DOOR WARNING LIGH CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76015PSEU FORWARD ENTRY DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76016PSEU FORWARD SERVICE DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76019PSEU LEFT OVERWING DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76020PSEU LEFT FORWARD OVERWING DOOR WARNING
LIGHT CIRCUIT IS OPEN OR SHORTED
C1180P6-3 F14
52-76021PSEU RIGHT OVERWING DOOR WARNING LIGHT CIRCUIT
IS OPEN OR SHORTED
C1180P6-3 F14
52-76022PSEU RIGHT FORWARD OVERWING DOOR WARNING
LIGHT CIRCUIT IS OPEN OR SHORTED
C1180P6-3 F14

就PSEU监控的原理与波音做了沟通,答复如下:

PSEU测量小电阻器两端的电压以获得电流,并测量输入电压。因此,PSEU接口处的电流和电压被检查。PSEU向DPC广播信号,DPC将信号传递给OMF。检查灯泡是否烧坏或连接不良。以31-56104为例,进行说明:

31-56104维护信息的触发,是当Takeoff BITE为真、且TAKEOFF WARN LIGHT 1的输出没有被检测到有外部负载。这一信息会被重置,一种条件是:在空中状态,并且TAKEOFF WARN LIGHT 1的输出被检测到有外部负载时;另外一种条件是:执行更换测试或自检测试,检测到有外部负载。MM31-56104维护信息是被PSEU 1或者PSEU 2的label 302, SDI 01 或 SDI 10,Bit 17监控,当状态为1的时候,就认为触发该维护信息,并给到OMF。

737MAX飞机TAKEOFF WARN FAIL状态信息

SR 3-5678464583

2023年6月,有飞机反应出现TAKEOFF WARN FAIL状态信息,有LATCHED ACTIVE维护信息31-56105 PSEU TAKEOFF CONFIG LIGHT 2 CIRCUIT IS OPEN OR SHORTED AFTER TAKEOFF。发现机长侧BELOW G/S 和CABIN ALTITUDE 和TAKEOFF CONFIG灯灯光测试不亮,发现P6-3,E12 C314 MASTER DIM SECT2 跳出,闭合跳开关后,测试正常,信息清除。

该故障信息的含义是After a takeoff the circuit between the PSEU and the first officer’s TAKEOFF CONFIG light is open or shorted。检查中发现左侧的客舱高度,起飞构型,低于下滑道灯均不亮。

而右侧的灯光是正常的

PSEU自检不通过,出现了多条故障信息。

从线路看,P6-3 E12影响SECTION 2的相关下游灯组件,包含这三个灯在内。

经检查E12跳开关跳出,复位后灯光恢复正常。

从线路分析看,该跳开关一共影响8个灯的正常供电。

从PSEU监控的故障信息可以看出,737MAX的PSEU对自己输出的门警告灯、起落架红绿灯、起飞构型灯的线路都有监控,以判断指示是否工作正常。以下为对应的跳开关和位置,可作为查询参考。

就PSEU监控的原理与波音做了沟通,答复如下:

1、PSEU测量小电阻器两端的电压以获得电流,并测量输入电压。因此,PSEU接口处的电流和电压被检查。PSEU向DPC广播信号,DPC将信号传递给OMF。检查灯泡是否烧坏或连接不良。

2、31-56104维护信息的触发,是当Takeoff BITE为真、且TAKEOFF WARN LIGHT 1的输出没有被检测到有外部负载。这一信息会被重置,一种条件是:在空中状态,并且TAKEOFF WARN LIGHT 1的输出被检测到有外部负载时;另外一种条件是:执行更换测试或自检测试,检测到有外部负载。MM31-56104维护信息是被PSEU 1或者PSEU 2的label 302, SDI 01 或 SDI 10,Bit 17监控,当状态为1的时候,就认为触发该维护信息,并给到OMF。

3、31-56105维护信息的触发,是当Takeoff BITE为真、且TAKEOFF WARN LIGHT 2的输出没有被检测到有外部负载。这一信息会被重置,一种条件是:在空中状态,并且TAKEOFF WARN LIGHT 2的输出被检测到有外部负载时;另外一种条件是:执行更换测试或自检测试,检测到有外部负载。MM31-56105维护信息是被PSEU 1或者PSEU 2的label 302, SDI 01 或 SDI 10,Bit 18监控,当状态为1的时候,就认为触发该维护信息,并给到OMF。

4、27-02860维护信息,来源于SCE的label 351 SDI 11 Bit 28,当状态为1持续3秒,就认为触发该维护信息,并发送给DPC,并被OMF检测到。

当这些元件中的一个或多个出现问题时,就会发生此故障:

-SCE,M2940。

-SPEEDBRAKE EXTENDED灯,P3-1L1。

-线路问题。

如果地面测试显示器上显示维护信息27-02860(减速制动器EXTEND输出驱动器信号超出范围),波音公司建议参考IFIM27-62-00-810-814排故。

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