Owner produced parts

Tom-D

Taxi to Parking
Joined
Feb 23, 2005
Messages
34,740
Display Name

Display name:
Tom-D
no more under this reference
FAR 21.303 no longer says it does not apply to an owner supplying parts for their product. (as it did before)

21.303 Application.

(a) The applicant for a PMA must apply in a form and manner prescribed by the FAA, and include the following:

(1) The identity of the product on which the article is to be installed.

(2) The name and address of the manufacturing facilities at which these articles are to be manufactured.

(3) The design of the article, which consists of—

(i) Drawings and specifications necessary to show the configuration of the article; and

(ii) Information on dimensions, materials, and processes necessary to define the structural strength of the article.

(4) Test reports and computations necessary to show that the design of the article meets the airworthiness requirements of this subchapter. The test reports and computations must be applicable to the product on which the article is to be installed, unless the applicant shows that the design of the article is identical to the design of a article that is covered under a type certificate. If the design of the article was obtained by a licensing agreement, the applicant must provide evidence of that agreement.

(5) An applicant for a PMA based on test reports and computations must provide a statement certifying that the applicant has complied with the airworthiness requirements of this subchapter.

(b) Each applicant for a PMA must make all inspections and tests necessary to determine—

(1) Compliance with the applicable airworthiness requirements;

(2) That materials conform to the specifications in the design;

(3) That the article conforms to its approved design; and

(4) That the manufacturing processes, construction, and assembly conform to those specified in the design.
-------------------------------------------------------------------
You now must apply for a PMA to build any part for a Certified aircraft.
 
Last edited:
The rules are now in FAR 21.9

21.9 Replacement and modification articles.

(a) If a person knows, or should know, that a replacement or modification article is reasonably likely to be installed on a type-certificated product, the person may not produce that article unless it is—

(1) Produced under a type certificate;

(2) Produced under an FAA production approval;

(3) A standard part (such as a nut or bolt) manufactured in compliance with a government or established industry specification;

(4) A commercial part as defined in §21.1 of this part;

(5) Produced by an owner or operator for maintaining or altering that owner or operator's product; or

(6) Fabricated by an appropriately rated certificate holder with a quality system, and consumed in the repair or alteration of a product or article in accordance with part 43 of this chapter.

(b) Except as provided in paragraphs (a)(1) through (a)(2) of this section, a person who produces a replacement or modification article for sale may not represent that part as suitable for installation on a type-certificated product.

(c) Except as provided in paragraphs (a)(1) through (a)(2) of this section, a person may not sell or represent an article as suitable for installation on an aircraft type-certificated under §§21.25(a)(2) or 21.27 unless that article—

(1) Was declared surplus by the U.S. Armed Forces, and

(2) Was intended for use on that aircraft model by the U.S. Armed Forces.
 
Interesting, hopefully the are reorganizing for owner maint stuff....
 
Interesting, hopefully the are reorganizing for owner maint stuff....

This changed happened in 2011, so as far as I might know owner maintenance has already happened, but the FAR hasn't changed.

I just thought it was interesting that all the AC's and references point to 21.303, and have never been re-written to reference 21.9.
 
This changed happened in 2011, so as far as I might know owner maintenance has already happened, but the FAR hasn't changed.

I just thought it was interesting that all the AC's and references point to 21.303, and have never been re-written to reference 21.9.

Yeah, that was a miss...
 
Back
Top