Federal Aviation Administration, DOT

Section 21.17

SectionSection 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.
[Doc. No. FAA-2006-25877, Amdt. 21-92, 74 FR
53385, Oct. 16, 2009; Amdt. 21-92A, 75 FR 9095,
Mar. 1, 2010; Doc. No. FAA-2015-1621, Amdt.
21-100, 81 FR 96688, Dec. 30, 2016]

[Amdt. 21-19, 32 FR 17851, Dec. 13, 1967, as
amended by Amdt. 21-51, 45 FR 60170, Sept.
11, 1980]

Subpart B - Type Certificates
SOURCE: Docket No. 5085, 29 FR 14564, Oct.
24, 1964, unless otherwise noted.

Section 21.11 Applicability.
This subpart prescribes - 
(a) Procedural requirements for the
issue of type certificates for aircraft,
aircraft engines, and propellers; and
(b) Rules governing the holders of
those certificates.
Section 21.13 Eligibility.
Any interested person may apply for
a type certificate.
[Amdt. 21-25, 34 FR 14068, Sept. 5, 1969]

Section 21.15 Application for type certificate.
(a) An application for a type certificate is made on a form and in a manner
prescribed by the FAA.
(b) An application for an aircraft
type certificate must be accompanied
by a three-view drawing of that aircraft and available preliminary basic
data.
(c) An application for an aircraft engine type certificate must be accompanied by a description of the engine
design features, the engine operating
characteristics, and the proposed engine operating limitations.
[Doc. No. 5085, 29 FR 14564, Oct. 24, 1964, as
amended by Amdt. 21-40, 39 FR 35459, Oct. 1,
1974; Amdt. 21-67, 54 FR 39291, Sept. 25, 1989;
Amdt. 21-92, 74 FR 53385, Oct. 16, 2009; Doc.
No. FAA-2018-0119, Amdt. 21-101, 83 FR 9169,
Mar. 5, 2018]

spaschal on DSK3GDR082PROD with CFR

aircraft, aircraft engine or propeller,
he prescribes special conditions and
amendments thereto for the product.
The special conditions are issued in accordance with Part 11 of this chapter
and contain such safety standards for
the aircraft, aircraft engine or propeller as the FAA finds necessary to establish a level of safety equivalent to
that established in the regulations.

Section 21.16 Special conditions.
If the FAA finds that the airworthiness regulations of this subchapter do
not contain adequate or appropriate
safety standards for an aircraft, aircraft engine, or propeller because of a
novel or unusual design feature of the

Section 21.17 Designation of applicable regulations.
(a) Except as provided in SectionSection 25.2, 27.2,
29.2, and in parts 26, 34, and 36 of this
subchapter, an applicant for a type certificate must show that the aircraft,
aircraft engine, or propeller concerned
meets - 
(1) The applicable requirements of
this subchapter that are effective on
the date of application for that certificate unless - 
(i) Otherwise specified by the FAA; or
(ii) Compliance with later effective
amendments is elected or required
under this section; and
(2) Any special conditions prescribed
by the FAA.
(b) For special classes of aircraft, including the engines and propellers installed thereon (e.g., gliders, airships,
and other nonconventional aircraft),
for which airworthiness standards have
not been issued under this subchapter,
the applicable requirements will be the
portions of those other airworthiness
requirements contained in Parts 23, 25,
27, 29, 31, 33, and 35 found by the FAA
to be appropriate for the aircraft and
applicable to a specific type design, or
such airworthiness criteria as the FAA
may find provide an equivalent level of
safety to those parts.
(c) An application for type certification of a transport category aircraft
is effective for 5 years and an application for any other type certificate is effective for 3 years, unless an applicant
shows at the time of application that
his product requires a longer period of
time for design, development, and testing, and the FAA approves a longer period.
(d) In a case where a type certificate
has not been issued, or it is clear that

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