Federal Aviation Administration, DOT

Section 21.181

(b) An applicant for an amendment to
a production certificate to add a type
certificate or model, or both, must
comply with SectionSection 21.137, 21.138, and 21.150.
(c) An applicant may apply to amend
its production limitation record to
allow the manufacture and installation
of an interface component, provided - 
(1) The applicant owns or has a license to use the design and installation
data for the interface component and
makes that data available to the FAA
upon request;
(2) The applicant manufactures the
interface component;
(3) The applicant-s product conforms
to its approved type design and the
interface component conforms to its
approved type design;
(4) The assembled product with the
installed interface component is in a
condition for safe operation; and
(5) The applicant complies with any
other conditions and limitations the
FAA considers necessary.
[Doc. No. FAA-2013-0933, Amdt. 21-98, 80 FR
59031, Oct. 1, 2015, as amended by Amdt. 21-
98A, 80 FR 59031, Dec. 17, 2015]

Section 21.150 Changes in quality system.
After the issuance of a production
certificate - 
(a) Each change to the quality system is subject to review by the FAA;
and
(b) The holder of a production certificate must immediately notify the
FAA, in writing, of any change that
may affect the inspection, conformity,
or airworthiness of its product or article.

Subpart H - Airworthiness
Certificates
SOURCE: Docket No. 5085, 29 FR 14569, Oct.
24, 1964, unless otherwise noted.

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Section 21.171 Applicability.
This subpart prescribes procedural
requirements for the issue of airworthiness certificates.
Section 21.173 Eligibility.
Any registered owner of a U.S.-registered aircraft (or the agent of the
owner) may apply for an airworthiness
certificate for that aircraft. An appli-

cation for an airworthiness certificate
must be made in a form and manner acceptable to the FAA, and may be submitted to any FAA office.
[Amdt. 21-26, 34 FR 15244, Sept. 30, 1969]

Section 21.175 Airworthiness
classification.

certificates:

(a) Standard airworthiness certificates are airworthiness certificates
issued for aircraft type certificated in
the normal, utility, acrobatic, commuter, or transport category, and for
manned free balloons, and for aircraft
designated by the FAA as special classes of aircraft.
(b) Special airworthiness certificates
are primary, restricted, limited, lightsport, and provisional airworthiness
certificates, special flight permits, and
experimental certificates.
[Amdt. 21-21, 33 FR 6858, May 7, 1968, as
amended by Amdt. 21-60, 52 FR 8043, Mar. 13,
1987; Amdt. 21-70, 57 FR 41368, Sept. 9, 1992;
Amdt. 21-85, 69 FR 44861, July 27, 2004]

Section 21.177

Amendment or modification.

An airworthiness certificate may be
amended or modified only upon application to the FAA.
Section 21.179

Transferability.

An airworthiness certificate is transferred with the aircraft.
Section 21.181 Duration.
(a) Unless sooner surrendered, suspended, revoked, or a termination date
is otherwise established by the FAA,
airworthiness certificates are effective
as follows:
(1) Standard airworthiness certificates, special airworthiness certificates - primary category, and airworthiness certificates issued for restricted or limited category aircraft
are effective as long as the maintenance, preventive maintenance, and alterations are performed in accordance
with Parts 43 and 91 of this chapter and
the aircraft are registered in the
United States.
(2) A special flight permit is effective
for the period of time specified in the
permit.
(3) A special airworthiness certificate
in the light-sport category is effective
as long as - 

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