Drain Holes For Fabric Covering

[A2C]

Hello Folks:

Anyone know how to put drain hole fasteners in on fabric covered surfaces? Anyone have nomenclature for this?

Thanks,

[skymstr02]

Its called a grommet, and they are usually doped on to the clear coats under the pigmented coats.

[Obergrafeter]

Glue the grommets in like DZ says. There are two types, plain round, and sea plane grommets that have a reverse scoop on them. After you complete the flying surface you burn through the fabric (If man made) with a soldering iron.

[A2C]

Hello Folks:

That's good to know, but what's used when you want to go through 1 layer of fabric and 1 layer of sheet metal? Thanks a lot.

[N3Njeff]

Hello Folks:

That's good to know, but what's used when you want to go through 1 layer of fabric and 1 layer of sheet metal? Thanks a lot.

Drill bit, just go slow through the fabric where the gromet is.

[A2C]

Hi Jeff:

No, that's not it. It's looks like a rivnut that fastens the farbic to the metal. I was just wondering it there is something else used that looks a little like a rivnut.

Thanks

[bdk]

This is on a T-6? Do you have a photo of the area?

[Obergrafeter]

Move the grommet away from the metal (or just glue another on)

[A2C]

Can't be done. Basicly it's similar to a rivnut.

[Obergrafeter]

On a T-6? Doesn't sound familar, like BDK says send photo and prove us wrong.

[A2C]

Sorry too lazy to take a picture..I don't want to prove anything, just needed an answer to that. I think I'll call my hardware supplier, and see if he knows.

Thanks!

[RandolphB]

For the Acceptable Method, consult the AC 43.13-1B; Section 2-14 "Inspection Rings and Drain Grommets". Found on Pages 2-22 and 2-23.

If you don't have the text, it can be downloaded from the FAA website for free. If downloading just the chapter needed, it would be "Chapter Two- Fabric Covering."

[Seafury1]

Also, if you are using Poly Fiber, you can use poly tack to put the grommet up and a small soldering iron to burn a hole through the fabric. If the fabric is on sheet metal, you may not even need a grommet. consult the poly-fiber book.

[don]

Suggest you not use grommets. Just use soldering iron to make hole. Over time, the grommets come unstuck. Grommet are a carry over from the cotton days.

[A2C]

I hate to say it, but all the responses miss the mark. The fabric is over metal. The metal is enclosed, and so the drain hole is similar to a rivnut and goes through the fabric and metal. All I was asking is if anyone knows excactly the type of fastener/drain reinforcement used.