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secondary fuel pump

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Fergus Kyle

Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada

Posted: Mon Dec 10, 2007 2:26 pm Post subject: secondary fuel pump

Ron,

	I agree with you that if a pump fails, and its attendant bypass

valve sticks shut, then no fuel will emerge. Or if both pumps fail, no fuel

will emerge. Other than that perhaps my comprehension is low, but it seems

to me that a double failure has occurred - and the odds exceed those of

cardiac arrest.

	Can we not start on one pump, and taxi on the other, to prove a safe

system to begin with? That would reduce the odds of a double failure if we

don't start out with one to begin with........	Where have I gone wrong?

Cheers,ferg

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rparigor(at)suffolk.lib.n
Guest

Posted: Mon Dec 10, 2007 3:41 pm Post subject: secondary fuel pump

Hi Ferg



"Where have I gone wrong?"



Perhaps I should let someone else answer that 



I agree that both pumps one at a time should be checked to verify that

system is working. If wired as per Europa Schematic, can't turn off pump

#1 (or last time I checked anyway). Best test with some pressure in

manifold to ensure that each pump can meet crack pressure of fuel pressure

regulator when engine is making some BTUs. Test of pumps at low power

setting does not prove much.



Ron P.

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josok-e(at)ukolo.fi
Guest

Posted: Tue Dec 11, 2007 3:12 am Post subject: secondary fuel pump

Folks,

Graham complained about flying scarobatics with a Europa. I wish i could think of a word so nicely describing this and some other threads on the forum. 

That said, it still is a good thing to use all available brain power to think of possible failures and ways to prevent them. The last time i looked was fuel starvation number one on the list of accidents in GA. In more then 50 % of these cases, the tank was empty. 

Which makes me strongly believe that the worst component of all is us, the pilot. Consequently, i would prefer to check my own check valves for leaking or blocking. Using check lists is one method. Not flying while not in condition is another. Wish there was a pass/no pass button 



Regards,



Jos Okhuijsen

Visit -  www.EuropaOwners.org

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