Vent line not blocked, but tank pressurized?

[Carl Froehlich]

Originally Posted by 9GT

I could not find that valve on the MC web site Carl. Would you happen to have a part number or catagory you found it under? Also,,,is it a steel or plastic valve? Thanks!

Part number is 5492K51. It is plastic - I just weighed one and it comes in at 0.8 oz.

Carl

[jonweisw]

For those of you that don't know Carl, he's truly a genius.

[EXflyer]

Originally Posted by sbalmos

I would think bug or blockage too. But I've got fuel dripping overboard through the vent on the underside of my fuselage, as if it was a full tank sitting out in the hot sun. I wouldn't think I'd be getting fuel through and overboard if there was a big enough blockage like a bug, would I?

If you have any pressure in the fuel tank bet is something is blocking it not fully but almost causing the slight pressure. If a vent line is open fully and the line is full of fuel it takes very little pressure to force fuel out of it and there should be no pressure in the tank.

This comes from many years of experience with fuel, tanks and leaks.

[TS Flightlines]

Possibly an internal issue with the vent line? Gee Scott, I hope not. But sure sound like a venting issue.

Tom