737 NG QRH queries
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Joined: Nov 2009
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From: in the mix muff
737 NG QRH queries
Hi there
On the Wing-Body Overheat NNC it says:
1) ISOLATION VALVE switch ................ CLOSE
3) R PACK sitch ..................................OFF
This cause the operating pack to regulate to high flow in flight with the flaps up
But this latter statement doesn't suppose the ISOLATION VALVE is on AUTO for the opposite PACK to regulate n High flow?
On the Emergency NNC
5) Theust Levers (both) ................ reduce thrust to minimum or as needed for anti- ice
The appropriate action wouldn't be to disconnect A/T? I know LVL change at high speed on descent would idle it but isn't it better To have your speed under control?
On the Wing-Body Overheat NNC it says:
1) ISOLATION VALVE switch ................ CLOSE
3) R PACK sitch ..................................OFF
This cause the operating pack to regulate to high flow in flight with the flaps up
But this latter statement doesn't suppose the ISOLATION VALVE is on AUTO for the opposite PACK to regulate n High flow?
On the Emergency NNC
5) Theust Levers (both) ................ reduce thrust to minimum or as needed for anti- ice
The appropriate action wouldn't be to disconnect A/T? I know LVL change at high speed on descent would idle it but isn't it better To have your speed under control?
Joined: Feb 2007
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But this latter statement doesn't suppose the ISOLATION VALVE is on AUTO for the opposite PACK to regulate n High flow?

Joined: Sep 2008
Aviation Qualifications: ATPL
Posts: 3,435
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From: 41S174E
The appropriate action wouldn't be to disconnect A/T? I know LVL change at high speed on descent would idle it but isn't it better To have your speed under control




