737-500 fuel sys question?

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737-500 fuel sys question?

Postby vesalica » 10 Aug 2009, 11:40

Hi guys,

I performed pressure fueling of wing tank n2 without any indication and by overriding n2 tank valve.

When the tank was overfilled the fuel spilled from RH wing fuel vent.

Is this normal situation?

I'm asking you this because couple of my friend told me that when you overfill tank n2 it should spill at LH wing fuel vent.

I couldn't find this information in AMM.

Thanks.
vesalica
 
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Re: 737-500 fuel sys question?

Postby sjap » 10 Aug 2009, 12:07

Yes it s normal, when you manually fill tank 2 it will overflow on that side. Lh tank (1) will overflow on that side.
Center tank may overflow at both sides.
sjap
 
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Re: 737-500 fuel sys question?

Postby vesalica » 10 Aug 2009, 14:20

Thanks for the replay.

Is it possible when you fill tank n2, that fuel overflows on LH side?
vesalica
 
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Re: 737-500 fuel sys question?

Postby sjap » 10 Aug 2009, 21:03

Tank 2 overflows on the rh side. See the diagram in amm 28-13-00-0 figure 1
sjap
 
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Re: 737-500 fuel sys question?

Postby vesalica » 11 Aug 2009, 17:49

Thanks
vesalica
 
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Re: 737-500 fuel sys question?

Postby wael » 18 Dec 2009, 09:19

Hi, All
A fuel vent float valve allows fuel tank venting while preventing fuel from entering the vent channels/
tubing.
So you have to Override tank 1 valve too, to fill it.
Vent Tubes for small ammounts and allow vent only not for fuel transferes

Thanks
wael
 
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