Airworthiness shop or Repairman for Wing Tank Repair

[8424]

Hi George.

You may have already done these searches, but if not, here you go!

Ebay has a few tanks available, but they may have the same rust problem that you are dealing with.

You can find them here:

https://www.ebay.com/itm/184733648829?h ... OSwSEhgYzv~

https://www.ebay.com/itm/184733648738?h ... Swe5FgYzwC

https://www.ebay.com/itm/174783866825?h ... SwRtNgt40I


here's a couple from Texas Air Salvage with some rust in the filler necks:

https://www.texasairsalvage.com/main_vi ... id1=228044

https://www.texasairsalvage.com/main_vi ... id1=227994


Here's some 140/150 re-plated filler necks, not sure if they are the right part:

https://www.ebay.com/itm/143807778277?h ... SwGCxfly5x

Can't confirm this filler neck is for the 120/140 tank:

https://www.ebay.com/itm/274480983648?e ... Sw2XFUkLwX

Hope this helps.

Steve A H

[6643]

Wag-aero lists a couple of different steel filler necks, and one aluminum, which might be easier to weld into the existing tank.
https://www.wagaero.com/catalogsearch/r ... iller+neck

[a64pilot]

As an old contract welder I would certainly use an aluminum neck to weld to an aluminum tank, I don’t believe steel can be welded to aluminum, and as has been stated, the dissimilar metals can cause galvanic corrosion. I never realized my fuel tank neck was steel.
However an issue with using the aluminum neck is the fuel tank cap, be sure whatever cap you use is definitely vented, I would go so far as to drill two holes in it to replicate the original, some caps that are advertised to be vented will only vent one way, possibly due to our California friends (CARB).

Whatever metal is used, I still believe a good aircraft paint will help slow corrosion

[8296]

Here is a big thanks to all who have offered up information I can use. A special "tip of the hat" to John C for his pictures and link to Wag Aero fuel neck options. It looks like the third option in the first row is perhaps the best candidate. It is a mild steel exposed lipped neck attached to an aluminum ring which screws into a (separate purchase) weldable aluminum ring. I wonder how well the manufacturer takes care of the faying surface ( mating surface) between the steel and aluminum. Does anyone know how one would get a 337 field approval for the use of this hardware or is this a question to ask Wag Aero? The descriptors talk to this for use on homebuilts.

[6643]

Does anyone know how one would get a 337 field approval for the use of this hardware(?)

Is fuel tank repair on the list of major repairs? If not, then you don't need a 337. If it is, get someone who does aircraft fuel tank repairs for a living to do it.

[4004]

A case for JB Weld - didn't have epoxies 75 years ago! Seals and isolates unlike metals'

[a64pilot]

To use a non standard part to replace the fuel tank neck would require a 337 as your changing the part. (fuel tank no longer conforms to type design)
I bet though if you asked an FAA inspector that you knew and explained the original Cessna part was no longer available, but there is a nearly identical part that performs the same form, fit and function he wouldn’t require a 337

[8296]

FYI. I spoke to Wag Aero this AM and the part I had mentioned is classed as experimental in their inventory. The sales person told me that they internally class parts as 8 (experimental/homebuilt), 4 (certified), or 5 (such as hardware with military designation that can be used on certified aircraft). Unfortunately, the part I am interested in is an 8. Looks like I will have to try Jody's approach to make this work. I guess one could contact Cessna and see if they would sell filler necks to a private aircraft owner, but even is they did, which I doubt, they would probably want a small fortune for the part.

[8342]

Could they have used solder?
I was looking at the pictures of mine and that is what it looks like.

Check with Smokin Rivet aircraft parts in Eau Claire Wis, he may have some airworthy tanks.
He charges realistic prices.

Rick

[4004]

George:
If you want to check Cessna source and don't already know it - contact Yingling Aviation, number on their page, they are best Cessna info source cause they are right at Cessna location.