Help....! 737 classics, LH Pack Ram Air Door not closing in cruise

flyingspanner · 发表于 2010-2-20 09:03:31

Hi there,

This defect has an extensive histories. So far, the ram air temp sensor, ram air door actuator, turbo fan valve had been changed. Heat exchangers wash has also been done but the flight crew still keep reporting that the ram air door light won't go off in cruise but it went out when a/c descending to FL 300.

Any other suggestions about what else can be done??????

flyingspanner · 发表于 2010-2-20 09:04:55

Some more info about what have been done. The FIM task has been done for few times with no obvious fault found.

小丛 · 发表于 2010-2-20 11:33:52

这个故障经常发生：
原因比较多：作动器故障、灯显示故障、热交换器脏……

nvoodoo · 发表于 2010-2-25 05:48:06

classic不熟，制冷效果和右边的对比下，差很多的话会不会ACM问题？

nvoodoo · 发表于 2010-2-26 17:07:49

故障解决了吗？

flyingspanner · 发表于 2010-2-27 10:51:00

NO, stil happening intermittently.

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[70-80发动机CFM56-7] Help....! 737 classics, LH Pack Ram Air Door not closing in cruise