Animosity2k Posted November 11, 2019 Report Share Posted November 11, 2019 Noticed today while fueling up around my one fuel inlet I have some slight cracking in the paint. Is there a way to get this flaking to stay down rather than popping back up and worsening? Please see attached photos. Quote Link to comment Share on other sites More sharing options...
GrassStripFlyBoy Posted November 11, 2019 Report Share Posted November 11, 2019 Take a piece of Bolus tape, or similar, and stick over it as a countermeasure for worsening, until the proper "body work" paint touch up can occur. Quote Link to comment Share on other sites More sharing options...
Tip Posted November 12, 2019 Report Share Posted November 12, 2019 Does your filler neck weep fuel? It looks like a gas nozzle may have popped it loose. There have been filler necks & caps go missing in flight in the past. Quote Link to comment Share on other sites More sharing options...
Tip Posted November 12, 2019 Report Share Posted November 12, 2019 More on gas caps. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 12, 2019 Author Report Share Posted November 12, 2019 13 hours ago, Tip said: Does your filler neck weep fuel? It looks like a gas nozzle may have popped it loose. There have been filler necks & caps go missing in flight in the past. I don't believe it leaks at all. I haven't noticed any leaking and if I tug on it in the wing it seems secure. I am not much of a handyman, can a A&P reset it flush if need be? Also, where would the proper place to go for the paint work to be? Do they have aircraft paint shops? Is that something fairly simple looking to fix? Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 14, 2019 Author Report Share Posted November 14, 2019 On 11/11/2019 at 9:55 PM, Tip said: More on gas caps. Tip, today I was up at the hanger so I checked on the cap, it's not loose. It looks like perhaps the one on my PIC side wing may had come out and been glued in as I see more glue/epoxy around the red filler ring and the wing then on the other side. Now while I was cleaning the plane today I noticed some markings that ran from the fuel tank area of BOTH wings and then back towards the rear of the wing and the flaps. They were almost like streaks which IMO could have been fuel streaking back across the wing while in flight. They were both pretty much near the fuel cap area then worked backwards. However, I tugged on the filler necks when open and they won't pop loose. I also shut them and tried to wiggle an opening somewhere and couldn't. I'm thinking perhaps that streaking was just from some fuel dips that had splashed on wing when taking nozzle out or putting it in then worked there way back during flight. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 14, 2019 Author Report Share Posted November 14, 2019 On 11/11/2019 at 6:00 PM, GrassStripFlyBoy said: Take a piece of Bolus tape, or similar, and stick over it as a countermeasure for worsening, until the proper "body work" paint touch up can occur. Do they make some sort of clear coat enamel one can just lay over it that will hold it down? Quote Link to comment Share on other sites More sharing options...
Tip Posted November 14, 2019 Report Share Posted November 14, 2019 From my experience, if you have streaks, it’s leaking. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 14, 2019 Author Report Share Posted November 14, 2019 14 hours ago, Tip said: From my experience, if you have streaks, it’s leaking. I'm do for an annual by end of month is this something they can check for then? Is it easy to check? I get it on both wings... Quote Link to comment Share on other sites More sharing options...
okent Posted November 15, 2019 Report Share Posted November 15, 2019 +1 on what Tip said. I just had a fitting leak on my right wing system and my A&P did a pressure test to confirm it was fixed. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 15, 2019 Author Report Share Posted November 15, 2019 12 hours ago, okent said: +1 on what Tip said. I just had a fitting leak on my right wing system and my A&P did a pressure test to confirm it was fixed. I'll ask them to pressure test both wings during the annual as well. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted November 15, 2019 Report Share Posted November 15, 2019 1 hour ago, Animosity2k said: I'll ask them to pressure test both wings during the annual as well. Make absolutely sure they know what they are doing if they do this. Back in the early days of the CTLS there was a wing blown apart from putting to muck pressure in the vent system. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 15, 2019 Author Report Share Posted November 15, 2019 2 hours ago, Tom Baker said: Make absolutely sure they know what they are doing if they do this. Back in the early days of the CTLS there was a wing blown apart from putting to muck pressure in the vent system. Will do. Quote Link to comment Share on other sites More sharing options...
okent Posted November 16, 2019 Report Share Posted November 16, 2019 (edited) He told me how many psi he used. Cant remember the number but it sounded really low. I want to say it was less than 0.5 psi but dont quote me. Edited November 17, 2019 by okent clarification Quote Link to comment Share on other sites More sharing options...
Anticept Posted November 16, 2019 Report Share Posted November 16, 2019 I just noticed this thread. For all that is holy, do not use a typical kit for a test like this. The wings have no structural considerations for positive pressures. Keep it as low as possible if you're going to do this. Even 5psi is insanely high. That's five pounds per square inch. That's 720 pounds per square foot. I'd say there's a few square feet of surface area in the wing tanks so you're dealing with thousands of pounds of stress. For a positive pressure test, you need a super sensitive gauge and keep it to fractions of a PSI. Much like how avionics people test steam gauges, put a very tiny amount of pressure on the system, and just give it time to see if the pressure runs down as a way to check for leaking. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted November 16, 2019 Report Share Posted November 16, 2019 One of the ways I have seen metal tanks tested is to unroll a condom and place over the filler neck. Add just enough pressure to inflate the condom, then block the pressure source. If the condom stays inflated you are good. If it goes flat almost immediately you have a leak. If you try and put in to much pressure it will burst or blow off the filler neck. I'm not sure how you would do this for a CT without modifying a fuel cap. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 16, 2019 Author Report Share Posted November 16, 2019 3 hours ago, Anticept said: I just noticed this thread. For all that is holy, do not use a typical kit for a test like this. The wings have no structural considerations for positive pressures. Keep it as low as possible if you're going to do this. Even 5psi is insanely high. That's five pounds per square inch. That's 720 pounds per square foot. I'd say there's a few square feet of surface area in the wing tanks so you're dealing with thousands of pounds of stress. For a positive pressure test, you need a super sensitive gauge and keep it to fractions of a PSI. Much like how avionics people test steam gauges, put a very tiny amount of pressure on the system, and just give it time to see if the pressure runs down as a way to check for leaking. Man I wish you were still in the biz I may just try to mount a camera to my wing on the top and see if I an visually see any fuel coming out around the filler neck? Quote Link to comment Share on other sites More sharing options...
Tip Posted November 16, 2019 Report Share Posted November 16, 2019 On 11/13/2019 at 8:16 PM, Tip said: From my experience, if you have streaks, it’s leaking. I flew my plane this morning and it is streaking fuel from the flange. I will have it fixed before I fly again. This is the sixth one that I have been involved in repairing in 4 different CTLSs. Do not put air pressure in the tank. You can see in your picture the the flange has come up and brought the paint with it. Please read all of the posts that I copied and pasted above. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 16, 2019 Author Report Share Posted November 16, 2019 3 hours ago, Tip said: I flew my plane this morning and it is streaking fuel from the flange. I will have it fixed before I fly again. This is the sixth one that I have been involved in repairing in 4 different CTLSs. Do not put air pressure in the tank. You can see in your picture the the flange has come up and brought the paint with it. Please read all of the posts that I copied and pasted above. Sent you a PM! Quote Link to comment Share on other sites More sharing options...
okent Posted November 17, 2019 Report Share Posted November 17, 2019 Sorry, I did not notice my typo. It should have read .5. I'll correct the original post and add a leading zero. Quote Link to comment Share on other sites More sharing options...
Animosity2k Posted November 18, 2019 Author Report Share Posted November 18, 2019 On 11/16/2019 at 12:30 PM, Tip said: I flew my plane this morning and it is streaking fuel from the flange. I will have it fixed before I fly again. This is the sixth one that I have been involved in repairing in 4 different CTLSs. Do not put air pressure in the tank. You can see in your picture the the flange has come up and brought the paint with it. Please read all of the posts that I copied and pasted above. Tip, please check your private messages Quote Link to comment Share on other sites More sharing options...
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