Federal Aviation Administration, DOT
Section 21.502

Section 21.605

Acceptance of articles.

An article (including an article produced under a letter of TSO design approval) manufactured in a foreign
country or jurisdiction meets the requirements for acceptance under this
subchapter if - 
(a) That country or jurisdiction is
subject to the provisions of an agreement with the United States for the acceptance of that article;
(b) That article is marked in accordance with part 45 of this chapter; and
(c) An export airworthiness approval
has been issued in accordance with the
provisions of that agreement for that
article for import into the United
States.

Subpart O - Technical Standard
Order Approvals
SOURCE: Docket No. FAA-2006-25877, Amdt.
21-92, 74 FR 53392, Oct. 16, 2009, unless otherwise noted.

spaschal on DSK3GDR082PROD with CFR

Section 21.601

Applicability and definitions.

(a) This subpart prescribes - 
(1) Procedural requirements for
issuing TSO authorizations;
(2) Rules governing the holders of
TSO authorizations; and
(3) Procedural requirements for
issuing letters of TSO design approval.
(b) For the purposes of this subpart - 
(1) A TSO issued by the FAA is a
minimum performance standard for
specified articles used on civil aircraft;
(2) A TSO authorization is an FAA
design and production approval issued
to the manufacturer of an article that
has been found to meet a specific TSO;
(3) A letter of TSO design approval is
an FAA design approval for an article
that has been found to meet a specific
TSO in accordance with the procedures
of Section 21.621;
(4) An article manufactured under a
TSO authorization, an FAA letter of
acceptance as described in Section 21.613(b), or
an article manufactured under a letter
of TSO design approval described in
Section 21.621 is an approved article for the
purpose of meeting the regulations of
this chapter that require the article to
be approved; and
(5) An article manufacturer is the
person who controls the design and

quality of the article produced (or to be
produced, in the case of an application), including any related parts, processes, or services procured from an outside source.
Section 21.603

Application.

(a) An applicant for a TSO authorization must apply in the form and manner prescribed by the FAA. The applicant must include the following documents in the application:
(1) A statement of conformance certifying that the applicant has met the
requirements of this subpart and that
the article concerned meets the applicable TSO that is effective on the date
of application for that article.
(2) One copy of the technical data required in the applicable TSO.
(b) If the applicant anticipates a series of minor changes in accordance
with Section 21.619, the applicant may set
forth in its application the basic model
number of the article and the part
number of the components with open
brackets after it to denote that suffix
change letters or numbers (or combinations of them) will be added from time
to time.
(c) If the application is deficient, the
applicant must, when requested by the
FAA, provide any additional information necessary to show compliance
with this part. If the applicant fails to
provide the additional information
within 30 days after the FAA-s request,
the FAA denies the application and notifies the applicant.
[, as amended by Doc. No. FAA-2018-0119,
Amdt. 21-101, 83 FR 9169, Mar. 5, 2018]

Section 21.605

Organization.

(a) Each applicant for or holder of a
TSO authorization must provide the
FAA with a document - 
(1) Describing how its organization
will ensure compliance with the provisions of this subpart;
(2) Describing assigned responsibilities, delegated authorities, and the
functional relationship of those responsible for quality to management and
other organizational components; and
(3) Identifying an accountable manager.
(b) The accountable manager specified in paragraph (a) of this section

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