grnordgarden(at)cox.net
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 Posted: Mon May 19, 2008 3:50 pm Post subject: Fuel-Flow Problem -- Resolved |
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The Citabria's fuel system is okay now; the problem turned out to be with the filler caps. The A&P had time to give the system a good look late last week and we tested the fix with some local and cross-country flying over the weekend. The left tank still tends to contribute a bit more than the right in flight, but "it's always done that." And the system now crossflows on the ground when the wings are not level, which it had stopped doing.
The A&P didn't find any soft or swollen hoses so he took a close look at the cap gaskets and found that looking like new and performing like new aren't the same thing. There were no cracks or other obvious flaws but both gaskets were equally bad at sealing, so a simple cap-swap didn't change anything. It seems that the left tank just isn't as sensitive to venting/sealing problems as the right. To seal well, even with good gaskets, the caps have to be difficult to screw down tight.
Thanks to all who contributed ideas.
Rick N.
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