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139 

Federal Aviation Administration, DOT 

§ 21.21 

a type certificate will not be issued, 
within the time limit established under 
paragraph (c) of this section, the appli-
cant may— 

(1) File a new application for a type 

certificate and comply with all the pro-
visions of paragraph (a) of this section 
applicable to an original application; 
or 

(2) File for an extension of the origi-

nal application and comply with the 
applicable airworthiness requirements 
of this subchapter that were effective 
on a date, to be selected by the appli-
cant, not earlier than the date which 
precedes the date of issue of the type 
certificate by the time limit estab-
lished under paragraph (c) of this sec-
tion for the original application. 

(e) If an applicant elects to comply 

with an amendment to this subchapter 
that is effective after the filing of the 
application for a type certificate, he 
must also comply with any other 
amendment that the FAA finds is di-
rectly related. 

(f) For primary category aircraft, the 

requirements are: 

(1) The applicable airworthiness re-

quirements contained in parts 23, 27, 31, 
33, and 35 of this subchapter, or such 
other airworthiness criteria as the 
FAA may find appropriate and applica-
ble to the specific design and intended 
use and provide a level of safety ac-
ceptable to the FAA. 

(2) The noise standards of part 36 ap-

plicable to primary category aircraft. 

[Doc. No. 5085, 29 FR 14564, Oct. 24, 1964, as 
amended by Amdt. 21–19, 32 FR 17851, Dec. 13, 
1967; Amdt. 21–24, 34 FR 364, Jan. 10, 1969; 
Amdt. 21–42, 40 FR 1033, Jan. 6, 1975; Amdt. 
21–58, 50 FR 46877, Nov. 13, 1985; Amdt. 21–60, 
52 FR 8042, Mar. 13, 1987; Amdt. 21–68, 55 FR 
32860, Aug. 10, 1990; Amdt. 21–69, 56 FR 41051, 
Aug. 16, 1991; Amdt. 21–70, 57 FR 41367, Sept. 
9, 1992; Amdt. 21–90, 72 FR 63404, Nov. 8, 2007; 
Doc. No. FAA–2015–1621, Amdt. 21–100, 81 FR 
96688, Dec. 30, 2016] 

§ 21.19

Changes requiring a new type 

certificate. 

Each person who proposes to change 

a product must apply for a new type 
certificate if the FAA finds that the 
proposed change in design, power, 
thrust, or weight is so extensive that a 
substantially complete investigation of 

compliance with the applicable regula-
tions is required. 

[Doc. No. 28903, 65 FR 36265, June 7, 2000] 

§ 21.20

Compliance with applicable re-

quirements. 

The applicant for a type certificate, 

including an amended or supplemental 
type certificate, must— 

(a) Show compliance with all applica-

ble requirements and must provide the 
FAA the means by which such compli-
ance has been shown; and 

(b) Provide a statement certifying 

that the applicant has complied with 
the applicable requirements. 

[Doc. No. FAA–2006–25877, Amdt. 21–92, 74 FR 
53385, Oct. 16, 2009] 

§ 21.21

Issue of type certificate: nor-

mal, utility, acrobatic, commuter, 
and transport category aircraft; 
manned free balloons; special class-
es of aircraft; aircraft engines; pro-
pellers. 

An applicant is entitled to a type cer-

tificate for an aircraft in the normal, 
utility, acrobatic, commuter, or trans-
port category, or for a manned free bal-
loon, special class of aircraft, or an air-
craft engine or propeller, if— 

(a) The product qualifies under § 21.27; 

or 

(b) The applicant submits the type 

design, test reports, and computations 
necessary to show that the product to 
be certificated meets the applicable 
airworthiness, aircraft noise, fuel vent-
ing, and exhaust emission require-
ments of this subchapter and any spe-
cial conditions prescribed by the FAA, 
and the FAA finds— 

(1) Upon examination of the type de-

sign, and after completing all tests and 
inspections, that the type design and 
the product meet the applicable noise, 
fuel venting, and emissions require-
ments of this subchapter, and further 
finds that they meet the applicable air-
worthiness requirements of this sub-
chapter or that any airworthiness pro-
visions not complied with are com-
pensated for by factors that provide an 
equivalent level of safety; and 

(2) For an aircraft, that no feature or 

characteristic makes it unsafe for the 

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