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Small Fuel Leak Wing Root Fitting

F

Frankster13

Active Member
I have a very small leak in my RV-14A fuel system and I am looking for help. The leak seems to be at the wing root where the "S" shape aluminum fuel line connects to the threaded nipple fitting on the wing root. It is where the flared portion connects to the wing fitting. I have previously refit and reflared the line. Still I am getting a very very small leak.

QUESTION: I understand aircraft spruce has aluminum crush washers that can be used in just such a circumstance. What is the size and part number that would fit for Vans aircraft. I believe all Vans aircraft have the same size fuel line/tubing. The washers are specifically for this use and designed for flared aluminum fuel lines.
 
This is probably one of the most frustrating tubes to make, because of the short distance from flare to bends. Make sure the flares are good first, then you can massage the tube in place----3003O is soft.
Make sure the flares are 'square' to the AN nipple flares.

Tom
 
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