HERKY 3615 Posted May 27, 2010 Share Posted May 27, 2010 Hi, lately I have been working in an C-130E because we have a fuel leak around number 3 tank but I can´t find anything, we already retorque the booster pump panel acces, I checked the dry bay number three and center and behind flap wheel, but everything is dry there is any fuel. It starts to leak when we are between 15000 througt 18000 ft high and is visible near to the morring point in rh. I would like to get some information to get the leak fixed up. :confused: Quote Link to comment Share on other sites More sharing options...
FourToPower Posted May 27, 2010 Share Posted May 27, 2010 Hi, lately I have been working in an C-130E because we have a fuel leak around number 3 tank but I can´t find anything, we already retorque the booster pump panel acces, I checked the dry bay number three and center and behind flap wheel, but everything is dry there is any fuel. It starts to leak when we are between 15000 througt 18000 ft high and is visible near to the morring point in rh. I would like to get some information to get the leak fixed up. :confused: Not sure this question is posted in the right area but I'm sure the mods will place this in the appropriate section. As for your leak the best thing to do is to pressurize the tank using a manometer. Use leak detect solution (soapy water) on the entire wing upper, lower, dry bay, and flap well surfaces. This is the best way to identify a leak. We use this method everyday at the depot. Send me a private message if you have any other questions. Quote Link to comment Share on other sites More sharing options...
CannonHerks Posted May 27, 2010 Share Posted May 27, 2010 I have seen a lot of leaks develop in this area due to improper hardware installed in the wing splice panel...If longer screws were used in this area it would negate the sealed nut plates in the main tanks. Quote Link to comment Share on other sites More sharing options...
APG85 Posted May 27, 2010 Share Posted May 27, 2010 Not sure from your description where your leak is coming from but... I've seen several "mystery in-flight leaks" over the years yet everything is fine on the ground. Check the wiggins fittings in the flapwells. I've seen these leak in-flight but not problem on the ground...You might have to work them all in the affected area. Check the comp probes. They can leak in-flight off the top of the wing and give the appearance of coming from a flapwell. Good luck... Quote Link to comment Share on other sites More sharing options...
FourToPower Posted May 27, 2010 Share Posted May 27, 2010 I have seen a lot of leaks develop in this area due to improper hardware installed in the wing splice panel...If longer screws were used in this area it would negate the sealed nut plates in the main tanks. This is a good point as well. We had one last week where this occurred. The domenuts at the front and back ends of the splice panel have particular length screws that must be used. If you put one in that is too long the seal on the nutplate will be lost and you will certainly get a leak. Quote Link to comment Share on other sites More sharing options...
tusker Posted May 27, 2010 Share Posted May 27, 2010 Well guys, when I was for Air Canada, .....I was a tank sealer for a certain period of time. Beleive me, I went in fuel tanks quite a few times. We were doin' "negative checks". So, we were makin' vacuum in the tank,........spray some dye liquid outside the suspected wing surface area. Then, we were goin' into the tank, crawlin' like rats with a light, ......and could see the signs of leaks. We never missed the target!!...............we were "tank sealers" We were the guys who could fix the problem!!! Give me $ and I'll fix it!!! Quote Link to comment Share on other sites More sharing options...
trev130eng Posted June 2, 2010 Share Posted June 2, 2010 If you are using fuel from the aux or external tanks at the time then suspect the plumbing in the dry bay. Had many leaks from this plumbing in flight that cannot be reproduced on the ground. Quote Link to comment Share on other sites More sharing options...
aziizurrahman Posted November 26, 2011 Share Posted November 26, 2011 buddy,,,,for ur problem,,,wht have u did for the rectification on that problem?fuel leak....i got thae same problem...any idea Quote Link to comment Share on other sites More sharing options...
talons1555 Posted November 27, 2011 Share Posted November 27, 2011 Too bad you can't pressurize the tank with a mixture of nitrogen and Helium, then get a helium detector and start sniffing. I use one at work, pretty cool system. Quote Link to comment Share on other sites More sharing options...
Ben Legere Posted November 27, 2011 Share Posted November 27, 2011 [ATTACH=CONFIG]2528[/ATTACH] The bleed ports in the plumbing like to leak in flight but check out just fine on the ground... You may want to check them out. Quote Link to comment Share on other sites More sharing options...
tusker Posted November 30, 2011 Share Posted November 30, 2011 are you talking about fuel line shrouds!!! Quote Link to comment Share on other sites More sharing options...
doc130 Posted June 4, 2012 Share Posted June 4, 2012 If the plane is in a climb with the tank full it could be coming from the (bathtub fitting),the areas in the top corner of the tank ( rear of the tank.It will leak from the extreme top part of the tank in the flapwell . The FIX is to enter the tank ,scrape and inject sealant into the sealant ports... Quote Link to comment Share on other sites More sharing options...
ARosica Posted July 28, 2012 Share Posted July 28, 2012 I would check those PITA nut plates on the splice panel. It could also be a faulty filler cap, a loose screw or bad seal on an externally mounted probe. Quote Link to comment Share on other sites More sharing options...
larry myers Posted July 28, 2012 Share Posted July 28, 2012 Geez guys, it seems that some two years after the orginal post herky 3615 has found and fixed his fuel leak. Quote Link to comment Share on other sites More sharing options...
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