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B737-700800MAINT灯亮故障处理和如何解除低滑油量造成MAINT灯亮功能以及ice logic功能简单介绍.ppt

发布:2018-05-06约4.18千字共12页下载文档
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B737-700/800MAINT灯亮故障处理 和如何解除低滑油量造成MAINT灯亮功能 以及ice logic功能简单介绍 故障现象 APU 自动停车,且MAINT 灯亮 手册中的描述是这样的: HNA ALL; AIRPLANES WITH APU SOFTWARE PART NUMBER PRIOR TO 491A-TUSA04-00 The ECU uses the MAINT light to tell you when the starter-generator has a shorted rotating diode. Repair the starter-generator as soon as possible. HNA ALL; AIRPLANES WITH APU SOFTWARE PART NUMBER 491A-TUS-A04-00 and on. The ECU uses the MAINT light to tell you when the starter-generator has a shorted rotating diode. Repair the starter-generator as soon as possible. You will not be able to start the APU until you enter STARTOK on the current status page scratch pad. HNA ALL The ECU also uses the MAINT light to tell you the APU oil level is at low oil quantity (LOQ). When the oil level is at LOQ, there is enough oil in the APU for 30 - 50 hours of operation at the maximum oil consumption rate before the APU will shutdown because of low oil pressure. However, if there is an oil leak, the APU will not operate the 30 - 50 hours before a low oil pressure shutdown occurs. Add oil to the APU as soon as possible. 就是说:maint灯亮的原因有两种: 一种是49-91227,LOW OIL QUANTITY。(LOQ) 另一种是不管软件件号是什么,49-41244,STATR CONVERTER UNIT DETECTED A SHORTED ROTATING DIODE (一般会伴随着APU FAULT灯亮,可能原因Starter-generator, YAAG013 故障 和Start converter unit, M1710.故障) 我们先看比较重要的故障信息49-41244,STATR CONVERTER UNIT DETECTED A SHORTED ROTATING DIODE 在电子舱,查看SCU的件号: a, 件号为1152466-250 可以再次尝试起动APU,从CDU上查看你想需要的其他参数 b,件号为1152426-245或1151858-241,在排除故障之前,禁止再次起动APU。(极可能会损坏SCU) 排故过程 最好在不管当时故障与否,都应该将滑油加满 对于件号为1152466-250的SCU,进行以下步骤: A, 多次(3次以上)进行APU起动观察MAINT 灯是否亮。如果没有亮,或至少1次不亮,那么很有可能时假信息,那么对APU进行使用观察。参照Honeywell SB 1152466-49-13(推荐将这种改变加入-250序列号2的SCU以防止这种假信息再次显示到CDU上)。 B, 如果在MAINT灯亮或无法起动,那么按照AMM TASK 49-41-21-000-801 p401更换SG。 C,将APU起动电门置于ON位(不能先放到START位,否则APU就开始起 动了), 在CDU上对APU进行自检,如果当前没有任何故障信息,那么起动APU,并进行供电,供气测试,如果正常,恢复飞机至正常。 D,如果仍有该故障代码或MAINT灯亮,那么按照AMM TASK 49-41-61-000-801 p401更换SCU。 E,将APU起动电门置于ON位(不能先放到START位,否则APU就开始起动了), 在CD
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