boeing767mech
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Total Useless Triva Question (757 Info)

Tue May 29, 2007 7:39 pm

My employer is in the middle of installing a UFI mod(universal fault insolator) unit to our 757 center tanks fuel boost pumps. To date we have done more than 2/3's of the fleet. Funny thing was when we started not many people knew what it took to get the center boost pumps to run on the ground in the hanger, so I post this question for you.

Besides starting a engine how can you get the center fuel boost pumps to run in the hanger?

David

PS. I know of 2 ways maybe someone else knows another trick
Never under-estimate the predictably of stupidty
 
fr8mech
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 8:36 pm

Open the fuel panel door is one of the ways. For the life of me I can't remember the second.

[Edited 2007-05-29 13:37:05]
When seconds count...the police are minutes away.
 
Tristarsteve
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 10:01 pm

Well first you have to latch in the push button switch for the fuel pump
Then you can either open the refuel door, or get the speed card to signal engine running.
On some speed cards there is a manual test switch which will produce the desired effect.
There is no other way to get the centre tank pump relay to energise.
 
2enginesonly
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 10:07 pm

Yes, the fuel panel is one....the other might be activating the N3 speedcard?? ( RR engines )

Arjan
 
boeing767mech
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 10:20 pm

Wow that was quick. I have people I work with that couldn't get that right without looking in the manual. I use the speed card C/B's since I'm too lazy to get a ladder and get into the P50 panel to flip the switches.

David
Never under-estimate the predictably of stupidty
 
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HAWK21M
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 10:30 pm

I'm aware of the Fuel Panel door,as the Override pumps can be used for Fuel transfer on ground.
The 2nd is making the Speed card sense Engine running.

I have a related question.... Whats the min fuel permitted to be retained in the Ctr tank in flt under regulatory norms.
Also in case of Fuel in the CTR tank on Arrival & the need to transfer the Fuel to the Wing tanks if the Total fuel is <13200kgs.Wouldn't it amount to dry running the Override pumps while emptying the CTR tank.
Views.

regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
boeing767mech
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 10:42 pm

Quoting HAWK21M (Reply 5):
I have a related question.... Whats the min fuel permitted to be retained in the Ctr tank in flt under regulatory norms.

Empty, that is what we are doing with this mod.

http://www.aa.com/content/amrcorp/pr...ssReleases/2007_04/19_safety.jhtml

The station I work at has done over 55 over these mod, 10 hours of laying in the belly doing the P33 panel sucks

David
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HAWK21M
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 11:00 pm

Thanks for that link.
In case that mod is not accomplished,what is the restriction on Minimum fuel in CTR tank.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
boeing767mech
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RE: Total Useless Triva Question (757 Info)

Tue May 29, 2007 11:08 pm

1000 pounds as stated in link.

David
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fr8mech
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RE: Total Useless Triva Question (757 Info)

Wed May 30, 2007 2:50 pm

Speed card???? How the hell can I forget that?

Oh well, that's what the books are for.
When seconds count...the police are minutes away.
 
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HAWK21M
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RE: Total Useless Triva Question (757 Info)

Wed May 30, 2007 6:36 pm

Quoting Boeing767mech (Reply 8):
1000 pounds as stated in link.

500Kgs.
Thanks.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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