1975 M20F CB solution rh fuel cap 431-21A

[Jpravi8tor]

Greeting fellow members,

I have just been made aware that gasp I am a CB due to my lack of fundamental! Does anyone have a cb solution for a fuel cap?

Someone in the last few years opened the cap of my recent abandoned Mooney purchase and reinstalled it cockeyed!

i have soaked it with Aeorokroil for 2 months to no avail…today I went for it and literally twisted the stem right off!

im thinking I can just punch the center out at this point? Time to ponder while I find a replacement 

[KSMooniac]

Try Beegles in CO for a replacement.

Sent from my LM-V405 using Tapatalk

[carusoam]

@OSUAV8TER used to be in the fuel cap rehab business…. He may have remaining parts to offload?

Best regards,

-a-

[Jpravi8tor]

Ok brain trust will a m20 K cap fit a m20 F? I believe they are both a size 3

 

P/N: 431-9R  Alt P/N: 531-001

[Fly Boomer]

11 minutes ago, Jpravi8tor said:

Ok brain trust will a m20 K cap fit a m20 F? I believe they are both a size 3

Caps on my 252 are marked p/n 531-001.

[carusoam]

Check the part number for accuracy…

Many look alike… but may not fit the part that is in your plane…

Best regards,

-a-

[Jpravi8tor]

The ipc has 431-21A but with Shaw aero caps there is a lot of commonality 

[carusoam]

Back in the day… I ordered caps for my M20C… through the MSC system…

When I got them… they were not clocked right… so… they worked but did not line up properly with the wind over the wing…

Turns out the caps weren’t my real problem either… the fuel neck they were mounted in was going away…

 

The part number probably defines all of the variables… when the number changes, it probably changes the part some how…

Best regards,

-a-

[Jpravi8tor]

I have been advised that a 431-9R is the replacement cap for the 431-21A can anyone corroborate?

[Sabremech]

56 minutes ago, Jpravi8tor said:

I have been advised that a 431-9R is the replacement cap for the 431-21A can anyone corroborate?

I have a mod I did to my C that put all new fuel caps and flanges in. I’ll post a copy of the 337 here tonight along with in the 337 archive thread. Might be an option for you.

David

 

[hammdo]

And they’re awesome…

-Don

[Fly Boomer]

30 minutes ago, Sabremech said:

I’ll post a copy of the 337 here tonight along with in the 337 archive thread.

Downloads under STC's and 337's?

[Jpravi8tor]

I have been informed by a second source that 431-9 supercedes the 21A also my good workimg cap on the left is a 431-9 thanks all that helped

[Sabremech]

Let’s see if the 337 will post here. Here’s what I did for my ( Hammdo’s now) Mooney. 

Scannable Document on May 2, 2022 at 6_56_13 PM.pdf

[Sabremech]

I believe the caps and flanges I installed are Newton Aero 200 series caps. It’s a nice easy mod to do and the FAA just asked for me to fill out a 337 for the next owner. Fuel caps are used on new production aircraft so no field approval required.

David

[Fly Boomer]

2 hours ago, Sabremech said:

Let’s see if the 337 will post

I tried to push it up to the downloads area, but it threw an error.  I can download from this thread, and it reads fine.  Maybe @mooniac58 can help.

 

Well, that's unexpected; I couldn't upload a screenshot of the error either.  Not sure where to go from here.

 

 

 

 

 

 

 

 

 

 

 

[mooniac58]

It looks like we are having server issues with uploading files.  Might have a storage limit issue on the server.  I hope to have this resolved soon!

Craig