Rust on the fuel hose connexion

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astaib
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Rust on the fuel hose connexion

Post by astaib »

Hello,

While inspecting the maintenances holes for another reason I discovered rust on the thread of the fuel hose connexion to each tank.

I never inspected before, so I cannot tell if it’s getting worse fast.

What would you do?

Thanks for your tips.

Arnaud.
20E20659-3875-4CD4-B04E-DA59CAFB4B07.jpeg
52CACCEA-16B5-4E12-9D53-4BAF4A44751C.jpeg
Arnaud
DA40 Star 180 / 40.026 / 2001
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GNS430 NON-WAAS
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pietromarx
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Re: Rust on the fuel hose connexion

Post by pietromarx »

I am guessing from your comments that this isn't it, but maybe: http://support.diamond-air.at/fileadmin ... ncl-WI.pdf

Further, with the relatively early serial number, it may be simply a previously unreported issue that is similar.

Regardless, replace!
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astaib
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Re: Rust on the fuel hose connexion

Post by astaib »

Thank you!

Do you think that it really has to be replaced? Is it not possible to remove the rust manually?
Do you know if the wings has to be removed for that. Do you know if these hoses are expensives?

They have been changed in 2013 on my plane for MSI and the plane is not living neither outside nor close to the see.

Arnaud.
Arnaud
DA40 Star 180 / 40.026 / 2001
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GNS430 NON-WAAS
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astaib
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Re: Rust on the fuel hose connexion

Post by astaib »

Maybe I get it wrong because it doesn't seem to be the fuel hose, but the fuel probe.
The picture are from the pilot wing (LH).

Arnaud.
Arnaud
DA40 Star 180 / 40.026 / 2001
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Skitube
GNS430 NON-WAAS
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Rich
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Re: Rust on the fuel hose connexion

Post by Rich »

astaib wrote: Mon Oct 26, 2020 1:21 pm Maybe I get it wrong because it doesn't seem to be the fuel hose, but the fuel probe.
The picture are from the pilot wing (LH).

Arnaud.
That is the fuel line all right. I was just looking at that connection on mine.
N4OXE Right Tank fuel connection..jpg
On yours, I'm not sold that it's rust/corrosion you're seeing. It could be something like thread lube or anti-seize compound used previously. I would try cleaning it up with some solvent and see how that turns out. You should be able to do this with everything still in place.
2002 DA40-180: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
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astaib
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Re: Rust on the fuel hose connexion

Post by astaib »

Hi Rich,

I will try, but the pictures on the forum has lost their quality, so we cannot really, but it looks like rust. I will tell you :).
On my pictures we can also see black "paste". I think it has been placed here (only on one tank) because of leakage. Do you know if this is lasting long or if I have to do something?


Arnaud
Arnaud
DA40 Star 180 / 40.026 / 2001
Wingtip, landing and taxing LED (Whelen)
Skitube
GNS430 NON-WAAS
Steam gauges
Non certified ADS-b
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Rich
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Re: Rust on the fuel hose connexion

Post by Rich »

astaib wrote: Mon Oct 26, 2020 2:08 pm Hi Rich,

I will try, but the pictures on the forum has lost their quality, so we cannot really, but it looks like rust. I will tell you :).
On my pictures we can also see black "paste". I think it has been placed here (only on one tank) because of leakage. Do you know if this is lasting long or if I have to do something?


Arnaud
Note that my fuel fitting shows no such rust and it's easily as old as yours. Maybe the replacement line you have is a non-standard part. I was looking at this area recently, thinking I would need to pull the line to get at the finger-filter. I concluded one might be able to remove it without pulling the wing, but it'd be a teeth-grinding exercise. Do the fittings on both sides show this problem?

That black goop is probably a leak repair, using something like J-B Weld. Once or twice I've heard of pinholes forming in the lower part of the inner cell, probably triggered by moisture accumulation. J-B Weld, in particular, has a really good reputation for lasting forever. I would leave it unless it starts to leak. In that case you'll likely need to replace the inner cell.
2002 DA40-180: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
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astaib
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Re: Rust on the fuel hose connexion

Post by astaib »

The other side looks like this:
Capture.JPG
There is something similar but the area is smaller as the hose looks screwed deeper.
BTW is it really the hose or the probe? I have to go and check again.

The J-B Weld do its job perfectly, no leak !

Arnaud.
Arnaud
DA40 Star 180 / 40.026 / 2001
Wingtip, landing and taxing LED (Whelen)
Skitube
GNS430 NON-WAAS
Steam gauges
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Rich
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Re: Rust on the fuel hose connexion

Post by Rich »

BTW, the safety-wire job for your pilot-side fuel drain is poorly done. Your other side is an example of how it should be done.
2002 DA40-180: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
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Rich
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Re: Rust on the fuel hose connexion

Post by Rich »

In looking more carefully, it would appear this stuff is actually on the fuel finger filters to which the fuel lines connect. These are probably the originals. The IPC shows it a bit better than the AMM.
2002 DA40-180: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
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