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B737 NG bleeds off take off upper DU indications

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B737 NG bleeds off take off upper DU indications

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Old 21st Oct 2014, 02:39
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B737 NG bleeds off take off upper DU indications

Hi all

I have noticed that when I have conducted a bleeds off t/o and then re-configured the a/c back to bleeds on config, the Upper Du; ie the (the start valve open, oil filter bypass and low oil pressure) indicators monentarily blink when re-configuring the air systems panel, why is this

Thank you
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Old 21st Oct 2014, 08:12
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They shouldn't from what I remember.
But then again never seen this happen before does not mean it doesn't behave this way.
Just a strange thought, but when and how do you configure for Bleeds Off (and On again)? Could the sequence of configurations have an impact on these? For that this question is returned to you to list them. Never seen it happen when using standard Boeing procedures, but most airlines have adapted these to their own bastardised version...
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Old 21st Oct 2014, 11:17
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i am using the standard procedures from the boeing supp procedures in fcom to reconfig to a bleeds on config
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