B737NG Nitrogen Generation System CH47

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B737NG Nitrogen Generation System CH47

Postby Himmel » 17 Apr 2008, 12:12

G'day there
Regarding ATA Chapter 47 Nitrogen Generation System on late build NG's Hi flow commences at TOPD,a differential pressure sensor and a altitude sensor signals the controller ,(commands the hi flow valve to open.) My question is what role does the T/E flap switch play as far inputs to the controller during flight.Thanks Dan :?:
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Re: B737NG Nitrogen Generation System CH47

Postby troubleshooter » 17 Apr 2008, 23:49

The controller uses flap position (amongst other data) to control the HIGH FLOW VALVE in open or close position depending on the flight phase.
Have a look in AMM Part I 47-10-00 (High Flow Valve description) and 47-30-00 (NGS discrete inputs) and you will find a more detailed description.
This job sucks!!! I love this job!!!
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