Code of Federal Regulations - Title 14

147

Federal Aviation Administration, DOT

§ 21.101

with external equipment mounted to,
or external loads carried by, the heli-
copter;

by the addition or removal of floats
and skis;

(D) Flight with one or more doors

and/or windows removed or in an open
position; or

(E) Any changes in the operational

limitations placed on the helicopter as
a consequence of the addition or re-
moval of external equipment, floats,
and skis, or flight operations with
doors and/or windows removed or in an
open position.

(5) Tiltrotors.
(c) For purposes of complying with

part 34 of this chapter, any voluntary
change in the type design of the air-
plane or engine which may increase
fuel venting or exhaust emissions is an
‘‘emissions change.’’

[Amdt. 21–27, 34 FR 18363, Nov. 18, 1969]

DITORIAL

OTE

: For F

EDERAL

EGISTER

ci-

tations affecting § 21.93, see the List of CFR
Sections Affected, which appears in the
Finding Aids section of the printed volume
and at

www.fdsys.gov.

§ 21.95

Approval of minor changes in

type design.

Minor changes in a type design may

be approved under a method acceptable
to the FAA before submitting to the
FAA any substantiating or descriptive
data.

§ 21.97

Approval of major changes in

type design.

(a) An applicant for approval of a

major change in type design must—

(1) Provide substantiating data and

necessary descriptive data for inclu-
sion in the type design;

(2) Show that the change and areas

affected by the change comply with the
applicable requirements of this sub-
chapter, and provide the FAA the
means by which such compliance has
been shown; and

(3) Provide a statement certifying

that the applicant has complied with
the applicable requirements.

(b) Approval of a major change in the

type design of an aircraft engine is lim-
ited to the specific engine configura-
tion upon which the change is made
unless the applicant identifies in the

necessary descriptive data for inclu-
sion in the type design the other con-
figurations of the same engine type for
which approval is requested and shows
that the change is compatible with the
other configurations.

[Amdt. 21–40, 39 FR 35459, Oct. 1, 1974, as
amended by Amdt. 21–92, 74 FR 53387, Oct. 16,
2009; Amdt. 21–96, 77 FR 71695, Dec. 4, 2012]

§ 21.99

Required design changes.

(a) When an Airworthiness Directive

is issued under Part 39 the holder of
the type certificate for the product
concerned must—

(1) If the FAA finds that design

changes are necessary to correct the
unsafe condition of the product, and
upon his request, submit appropriate
design changes for approval; and

(2) Upon approval of the design

changes, make available the descrip-
tive data covering the changes to all
operators of products previously cer-
tificated under the type certificate.

(b) In a case where there are no cur-

rent unsafe conditions, but the FAA or
the holder of the type certificate finds
through service experience that
changes in type design will contribute
to the safety of the product, the holder
of the type certificate may submit ap-
propriate design changes for approval.
Upon approval of the changes, the man-
ufacturer must make information on
the design changes available to all op-
erators of the same type of product.

[Doc. No. 5085, 29 FR 14567, Oct. 24, 1964, as
amended by Amdt. 21–3, 30 FR 8826, July 24,
1965]

§ 21.101

Designation of applicable reg-

ulations.

(a) An applicant for a change to a

type certificate must show that the
change and areas affected by the
change comply with the airworthiness
requirements applicable to the cat-
egory of the product in effect on the
date of the application for the change
and with parts 34 and 36 of this chapter.
Exceptions are detailed in paragraphs
(b) and (c) of this section.

(b) Except as provided in paragraph

(g) of this section, if paragraphs (b)(1),
(2), or (3) of this section apply, an ap-
plicant may show that the change and
areas affected by the change comply

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