part # wing walk screw

[n5756k]

Hello, I have a 1984 M20J. On the forward upper wing I have a screw that holds the walking plate on the right wing. It is above the fuel tank and the screw is weeping fuel. I want to change this screw and reseal the new screw to the wing. Does anyone know the part number? I looked in the parts manual but can't find it.

Tom Moquin

1984, M20J,   tamoquin@foxvalley.net.   (847) 340-2325

[1980Mooney]

21 minutes ago, n5756k said:

Hello, I have a 1984 M20J. On the forward upper wing I have a screw that holds the walking plate on the right wing. It is above the fuel tank and the screw is weeping fuel. I want to change this screw and reseal the new screw to the wing. Does anyone know the part number? I looked in the parts manual but can't find it.

Tom Moquin

1984, M20J,   tamoquin@foxvalley.net.   (847) 340-2325

As far as I know the only screws on the top of the wing are around the inspection plates for the fuel tanks. There is no separate wing walk plate - only non-skid paint. 

[EricJ]

There's probably nothing wrong with the screw, but you could take it out and measure or match it to get a part number.   I don't think there's anything special about the screw.

A common fix is to take the screw out, clean any debris from the nut, and put some Permatex 3 on the screw and replace it.   There are more detailed instructions around here, or on Maxwell's site archive.

 

[1980Mooney]

Just now, 1980Mooney said:

As far as I know the only screws on the top of the wing are around the inspection plates for the fuel tanks. There is no separate wing walk plate - only non-skid paint. 

Also where it says “see 11-10-00” for the Wing Walk shown as 2A - - That is in the Paint and Decal Section 

[EricJ]

4 minutes ago, 1980Mooney said:

As far as I know the only screws on the top of the wing are around the inspection plates for the fuel tanks. There is no separate wing walk plate - only non-skid paint. 

There's a brace that I think is just a stiffener to support weight on the wing walk.   Mine has leaked from those screws, too.

[1980Mooney]

18 minutes ago, EricJ said:

There's probably nothing wrong with the screw, but you could take it out and measure or match it to get a part number.   I don't think there's anything special about the screw.

A common fix is to take the screw out, clean any debris from the nut, and put some Permatex 3 on the screw and replace it.   There are more detailed instructions around here, or on Maxwell's site archive.

 

You were right about the brace. I have posted a link to an earlier Mooneyspace topics. The link to Don Maxwell doesn’t work. It appears that all the free advice on here on the Don Maxwell website is gone  (Don Maxwell Mooney was sold and has a new owner -“GMAX”)

 

Edited January 21, 2022 by 1980Mooney

[EricJ]

5 minutes ago, 1980Mooney said:

You were right about the brace. I have posted a link to an earlier Mooneyspace topics. The link to Don Maxwell doesn’t work. It appears that all the free advice on here on the Don Maxwell website is gone  (Don Maxwell Mooney was sold and has a new owner -“GMAX”)

 

Many if not all of the articles are preserved on the wayback machine, aka web archive.   The pertinent one is here:

https://web.archive.org/web/20190103195252/http://donmaxwell.com/fuel-tank-repairs-how-we-fix-them/

 

[jaylw314]

3 hours ago, 1980Mooney said:

As far as I know the only screws on the top of the wing are around the inspection plates for the fuel tanks. There is no separate wing walk plate - only non-skid paint. 

 

What the heck?  Why is the wing walk on the left wing??

[atpdave]

Looks like they fixed it by 2005:

[Guest]

7 hours ago, n5756k said:

Hello, I have a 1984 M20J. On the forward upper wing I have a screw that holds the walking plate on the right wing. It is above the fuel tank and the screw is weeping fuel. I want to change this screw and reseal the new screw to the wing. Does anyone know the part number? I looked in the parts manual but can't find it.

Tom Moquin

1984, M20J,   tamoquin@foxvalley.net.   (847) 340-2325

AN507C1032R7

[OR75]

would Permatex 3 work for screws/panels that are under the wing ?

The upper panels (unless the tank is full to the nose) would be dry of fuel but i suppose the lower panels are almost always wet, especially  near the fuel drain 

[EricJ]

3 hours ago, OR75 said:

would Permatex 3 work for screws/panels that are under the wing ?

The upper panels (unless the tank is full to the nose) would be dry of fuel but i suppose the lower panels are almost always wet, especially  near the fuel drain 

If you keep the tanks full the upper screws at the wing walk are always wet, too.   The only head space is out near the filler cap if the tank is full.   This is why the wingwalk screws can leak.    So from that perspective it probably doesn't matter.   In Maxwell's article he doesn't distinguish between upper or lower panel screws.

 

[OR75]

13 hours ago, EricJ said:

If you keep the tanks full the upper screws at the wing walk are always wet, too.   The only head space is out near the filler cap if the tank is full.   This is why the wingwalk screws can leak.    So from that perspective it probably doesn't matter.   In Maxwell's article he doesn't distinguish between upper or lower panel screws.

 

So the Permatex 3 works (sets and seals) even if it it wet ?

it is not a 2 compound mix so I wondering what makes it set 

[carusoam]

On 1/21/2022 at 3:03 PM, jaylw314 said:

What the heck?  Why is the wing walk on the left wing??

Might be from the M20U or V drawing….

Soooo… does the brace use screws or rivets?

If screws, the ordinary reseal screws methodology works…

If rivets, that is the ordinary reseal rivets method… Done from the other side…

 

 

Sure DMax and Jimmy G combined business….  DMax and family are still part of the business….

 

PP thoughts only, 

-a-

[PT20J]

22 hours ago, OR75 said:

So the Permatex 3 works (sets and seals) even if it it wet ?

it is not a 2 compound mix so I wondering what makes it set 

[OR75]

3 hours ago, PT20J said:

Avgas being a good solvent itself , I still wonder how the solvent evaporates 

it would work on a top dry panel , but what about a wet panel 

[Andy95W]

4 minutes ago, OR75 said:

Avgas being a good solvent itself , I still wonder how the solvent evaporates 

it would work on a top dry panel , but what about a wet panel 

It works.  I don’t know why, but it does.

It won’t last for 20 years, but I did some of mine 3 years ago and they’re still dry.

[PT20J]

15 minutes ago, OR75 said:

Avgas being a good solvent itself , I still wonder how the solvent evaporates 

it would work on a top dry panel , but what about a wet panel 

The instructions on the product say to let it air dry for for a few minutes before assembly but I don't recall the note that is in the TDS posted above about it being serviceable after 4 hours and fully cured after 24 hours. But maybe I missed that. I once used it on a troublesome pipe fitting on a fuel pressure transducer and it leaked when pressure was applied. I did let it air dry until tacky, but I didn't wait four hours (or maybe better,  24 hours) before testing it. Perhaps if I had waited, it would have held pressure. But, this experience brings into question in my mind how well it might work on a tank screw that is in contact with fuel. At least the fuel wouldn't be under much pressure as in the case of the fuel pressure transducer.

Skip

[carusoam]

I think we are seeing a company trying to write instructions for the masses….

There glue drys….

If they said their polymer cross links enough to use in a few hours… and the cross linking continues until completed decades from now…. Where it is 90% cross linked after several hours….

 

Technically there isn’t any solvent coming out of their glue… so it isn’t really drying out….

If there was solvent coming out… and it still dried while in a tank of 100LL… you might be asking where all that solvent went?

Or what is that thin film floating in my tank?

 

PP thoughts only, not a rubber chemist….

Best regards,

-a-