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fabricating your own parts

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deej(at)deej.net
Guest

Posted: Tue Sep 21, 2010 11:14 am Post subject: fabricating your own parts

Hi all,

	I've seen various posts in the past concerning owner fabricated parts

that can be legally used on our Grummans.  I'm curious where the line is

between what we could fabricate, and what has to be factory made or

TSO'ed, etc.  As a specific example, could we fabricate our own

wheelpants?  In my case I'm talking about an AA1B, but this would

probably equally apply to most of our planes.



Thanks,



-Dj



-- 

Dj Merrill - N1JOV

Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/



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teamgrumman(at)YAHOO.COM
Guest

Posted: Tue Sep 21, 2010 11:46 am Post subject: fabricating your own parts

Get a copy of 14 CFR Part 121 and read up on what can be done under an owner produced part.  Garner knows a lot about this subject.  Ask him.  

The fact is, any part can be made.  The problem comes from trying to determine what needs a field approval or not.  Getting a field approval isn't trivial.  You do almost as much work as you would to get an STC.

This is an area where you will need to do your homework.



From: Dj Merrill <deej(at)deej.net>

To: teamgrumman-list(at)matronics.com

Sent: Tue, September 21, 2010 12:12:43 PM

Subject: fabricating your own parts



 --> TeamGrumman-List message posted by: Dj Merrill <deej(at)deej.net (deej(at)deej.net)>



Hi all,

    I've seen various posts in the past concerning owner fabricated parts

that can be legally used on our Grummans.  I'm curious where the line is

between what we could fabricate, and what has to be factory made or

TSO'ed, etc.  As a specific example, could we fabricate our own

wheelpants?  In my case I'm talking about an AA1B, but this would

probably equally apply to most of our planes.



Thanks,



-Dj



-- 

Dj Merrill - N1JOV

Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/



Please use Netiquette Guidelines http://tools.ietf.org/html/rfc1855

Kindly TRIM   



         [quote][b]

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deej(at)deej.net
Guest

Posted: Tue Sep 21, 2010 12:13 pm Post subject: fabricating your own parts

On 09/21/2010 03:35 PM, Gary Vogt wrote:

 	  Quote: 	
		   Get a copy of 14 CFR Part 121 and read up on what can be done under an

 owner produced part.  Garner knows a lot about this subject.  Ask him.  


	




Thanks, Gary.  I tried electronically searching through Part 121, and

the word "owner" does not appear anywhere, "produced" only once in a

different context, and "part" appears as "subpart" or "Part #" as in a

section of the regs.



I read through "Subpart L—Maintenance, Preventive Maintenance, and

Alterations" thinking that might be the most likely place to find

something, but I'm not seeing any reference to an owner produced part or

similar wording.



Do you have any more specific references where this might be found?

Part 121 is pretty huge!  



Thanks!



-Dj



-- 

Dj Merrill - N1JOV

Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/



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deej(at)deej.net
Guest

Posted: Tue Sep 21, 2010 12:52 pm Post subject: fabricating your own parts

I found one reference, Part 21, Subpart K "Approval of Materials, Parts,

Processes, and Appliances":



21.301   Applicability.



This subpart prescribes procedural requirements for the approval of

certain materials, parts, processes, and appliances.

21.303   Replacement and modification parts.



(a) Except as provided in paragraph (b) of this section, no person may

produce a modification or replacement part for sale for installation on

a type certificated product unless it is produced pursuant to a Parts

Manufacturer Approval issued under this subpart.



(b) This section does not apply to the following:



(1) Parts produced under a type or production certificate.



(2) Parts produced by an owner or operator for maintaining or altering

his own product.



	So if you aren't selling the parts you fabricate, this section doesn't

appear to apply.



	I'll keep poking some more...



-Dj



-- 

Dj Merrill - N1JOV

Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/



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deej(at)deej.net
Guest

Posted: Tue Sep 21, 2010 1:07 pm Post subject: fabricating your own parts

Here is an interesting article on the subject:



<http://www.amtonline.com/publication/article.jsp?pubId=1&id=1257>

http://www.amtonline.com/publication/article.jsp?pubId=1&id=1257

-Dj

-- 

Dj Merrill - N1JOV

Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/



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andy747(at)charter.net
Guest

Posted: Tue Sep 21, 2010 1:08 pm Post subject: fabricating your own parts

Hi Dj,



I am an A&P and I have read the information you are looking for but I am too 

lazy to try to find it.  What I think it says is this....If a part is not 

available throught any normal sources, an owner may fabricate that part 

using the same materials and design....also, as I recall, you could design 

the part (as above), have it fabricated and have a properly licensed person 

install it....this was put in to deal with old airplanes that are no longer 

in production but applies across the board.



If you really can't find it, I will look later....



---

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teamgrumman(at)YAHOO.COM
Guest

Posted: Tue Sep 21, 2010 7:53 pm Post subject: fabricating your own parts

my bad.  it is 21.  typo.

From: Dj Merrill <deej(at)deej.net>

To: teamgrumman-list(at)matronics.com

Sent: Tue, September 21, 2010 1:50:05 PM

Subject: Re: fabricating your own parts

 --> TeamGrumman-List message posted by: Dj Merrill <deej(at)deej.net (deej(at)deej.net)>

I found one reference, Part 21, Subpart K "Approval of Materials, Parts,

Processes, and Appliances":

21.301   Applicability.

This subpart prescribes procedural requirements for the approval of

certain materials, parts, processes, and appliances.

21.303   Replacement and modification parts.

(a) Except as provided in paragraph (b) of this section, no person may

produce a modification or replacement part for sale for installation on

a type certificated product unless it is produced pursuant to a Parts

Manufacturer Approval issued under this subpart.

(b) This section does not apply to the following:

(1) Parts produced under a type or production certificate.

(2) Parts produced by an owner or operator for maintaining or altering

his   

         [quote][b]

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Discover

Joined: 26 Feb 2007
Posts: 429

Posted: Tue Oct 12, 2010 8:52 pm Post subject: Re: fabricating your own parts

see page 6:



http://rgl.faa.gov/regulatory_and_guidance_library/rgorders.nsf/0/d1d550bbc2c82dd386257472005724ef/$FILE/Order%208110.42C.pdf



d. Aircraft Owners or Operators. Owners and operators may produce parts for installation on their own product without a PMA. The installation of these parts must comply with applicable airworthiness standards. If an owner or operator intends to sell a part for installation on another ownerâ€™s aircraft, then that owner or operator requires a PMA.

Good Review here:

http://150cessna.tripod.com/parts.html



Another one here:

http://www.stinsonvoyager.com/Owner%20Produced%20Parts.htm

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