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Old 16th Oct 2008, 03:17
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Flight Detent
 
Join Date: Jan 2002
Location: Brisbane, Australia
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Hi BJ,

I believe that the #1 hydraulic system is cooled in the #1 main tank, and with the higher load, will experience the highest heat transfer.

As a sidenote, our B737NGs have fuel tank temperature sensing for all 3 wing tanks, #1, CTR, and #2.
I only mention that only to show that there is a very big variation in 737NGs out there!

Cheers...FD...
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