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Tip Tank not feeding

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BobC

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On a recent 800nm trip in my Turbo Aztec F with Metco tip tanks the right tip stopped feeding. When inspected on the ground the aux was near empty as the gauge suggested and the tip was over 1/2 full.

Any suggestions? The system includes a vent tube that I am told starts below the aux filler cap, a fuel screen in the bottom of the tip tank and a one way valve that prevents fuel from daring from tip into aux and overflowing via gravity. I suspect it is one of these places but I am not sure the best way to test it.

John from Diamondaire suggested following a recurring AD for inspecting the vent but the only AD I found refers to Piper service Bulletin 340 which I cannot find.

Any suggestions would be helpful.
 

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