149 

Federal Aviation Administration, DOT 

§ 21.120 

was issued on or after the date of the 
applicable part 26 provision. 

[Doc. No. 28903, 65 FR 36266, June 7, 2000, as 
amended by Amdt. 21–90, 72 FR 63404, Nov. 8, 
2007; Amdt. 21–96, 77 FR 71695, Dec. 4, 2012] 

Subpart E—Supplemental Type 

Certificates 

S

OURCE

: Docket No. 5085, 29 FR 14568, Oct. 

24, 1964, unless otherwise noted. 

§ 21.111

Applicability. 

This subpart prescribes procedural 

requirements for the issue of supple-
mental type certificates. 

§ 21.113

Requirement for supplemental 

type certificate. 

(a) If a person holds the TC for a 

product and alters that product by in-
troducing a major change in type de-
sign that does not require an applica-
tion for a new TC under § 21.19, that 
person must either apply to the appro-
priate aircraft certification office for 
an STC or apply to amend the original 
type certificate under subpart D of this 
part. 

(b) If a person does not hold the TC 

for a product and alters that product 
by introducing a major change in type 
design that does not require an applica-
tion for a new TC under § 21.19, that 
person must apply to the appropriate 
aircraft certification office for an STC. 

(c) The application for an STC must 

be made in the form and manner pre-
scribed by the FAA. 

[Doc. No. FAA-2006-25877, Amdt. 21–92, 74 FR 
53387, Oct. 16, 2009] 

§ 21.115

Applicable requirements. 

(a) Each applicant for a supplemental 

type certificate must show that the al-
tered product meets applicable require-
ments specified in § 21.101 and, in the 
case of an acoustical change described 
in § 21.93(b), show compliance with the 
applicable noise requirements of part 
36 of this chapter and, in the case of an 
emissions change described in § 21.93(c), 
show compliance with the applicable 
fuel venting and exhaust emissions re-
quirements of part 34 of this chapter. 

(b) Each applicant for a supplemental 

type certificate must meet §§ 21.33 and 

21.53 with respect to each change in the 
type design. 

[Amdt. 21–17, 32 FR 14927, Oct. 28, 1967, as 
amended by Amdt. 21–42, 40 FR 1033, Jan. 6, 
1975; Amdt. 21–52A, 45 FR 79009, Nov. 28, 1980; 
Amdt. 21–61, 53 FR 3540, Feb. 5, 1988; Amdt. 
21–68, 55 FR 32860, Aug. 10, 1990; Amdt. 21–71, 
57 FR 42854, Sept. 16, 1992; Amdt. 21–77, 65 FR 
36266, June 7, 2000] 

§ 21.117

Issue of supplemental type 

certificates. 

(a) An applicant is entitled to a sup-

plemental type certificate if the FAA 
finds that the applicant meets the re-
quirements of §§ 21.113 and 21.115. 

(b) A supplemental type certificate 

consists of— 

(1) The approval by the FAA of a 

change in the type design of the prod-
uct; and 

(2) The type certificate previously 

issued for the product. 

[Docket No. 5085, 29 FR 14568, Oct. 24, 1964, as 
amended by Amdt. 21–92, 74 FR 53387, Oct. 16, 
2009] 

§ 21.119

Privileges. 

The holder of a supplemental type 

certificate may— 

(a) In the case of aircraft, obtain air-

worthiness certificates; 

(b) In the case of other products, ob-

tain approval for installation on cer-
tificated aircraft; and 

(c) Obtain a production certificate in 

accordance with the requirements of 
subpart G of this part for the change in 
the type design approved by the supple-
mental type certificate. 

[Docket No. 5085, 29 FR 14568, Oct. 24, 1964, as 
amended by Amdt. 21–92, 74 FR 53387, Oct. 16, 
2009] 

§ 21.120

Responsibility of supple-

mental type certificate holders to 
provide written permission for al-
terations. 

A supplemental type certificate hold-

er who allows a person to use the sup-
plemental type certificate to alter an 
aircraft, aircraft engine, or propeller 
must provide that person with written 
permission acceptable to the FAA. 

[Doc. No. FAA–2003–14825, 71 FR 52258, Sept. 
1, 2006] 

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