Federal Aviation Administration, DOT

Section 121.221

to certificate holders as stated in paragraphs (b) through (e) of this section.
(b) Except as provided in paragraph
(d) of this section, each airplane type
certificated under Aero Bulletin 7A or
part 04 of the Civil Air Regulations in
effect before November 1, 1946 must
meet the special airworthiness requirements in SectionSection 121.215 through 121.283.
(c) Each certificate holder must comply with the requirements of SectionSection 121.285
through 121.291.
(d) If the Administrator determines
that, for a particular model of airplane
used in cargo service, literal compliance with any requirement under paragraph (b) of this section would be extremely difficult and that compliance
would not contribute materially to the
objective sought, he may require compliance only with those requirements
that are necessary to accomplish the
basic objectives of this part.
(e) No person may operate under this
part a nontransport category airplane
type certificated after December 31,
1964, unless the airplane meets the special airworthiness requirements in
Section 121.293.

Section 121.217 Internal doors.
In any case where internal doors are
equipped with louvres or other ventilating means, there must be a means
convenient to the crew for closing the
flow of air through the door when necessary.
Section 121.219 Ventilation.
Each passenger or crew compartment
must be suitably ventilated. Carbon
monoxide concentration may not be
more than one part in 20,000 parts of
air, and fuel fumes may not be present.
In any case where partitions between
compartments have louvres or other
means allowing air to flow between
compartments, there must be a means
convenient to the crew for closing the
flow of air through the partitions,
when necessary.
Section 121.221 Fire precautions.
(a) Each compartment must be designed so that, when used for storing
cargo or baggage, it meets the following requirements:
(1) No compartment may include controls, wiring, lines, equipment, or accessories that would upon damage or
failure, affect the safe operation of the
airplane unless the item is adequately
shielded, isolated, or otherwise protected so that it cannot be damaged by
movement of cargo in the compartment and so that damage to or failure
of the item would not create a fire hazard in the compartment.
(2) Cargo or baggage may not interfere with the functioning of the fireprotective features of the compartment.
(3) Materials used in the construction
of the compartments, including tiedown equipment, must be at least
flame resistant.
(4) Each compartment must include
provisions for safeguarding against
fires according to the classifications
set forth in paragraphs (b) through (f)
of this section.
(b) Class A. Cargo and baggage compartments are classified in the  - A - 
category if - 
(1) A fire therein would be readily
discernible to a member of the crew
while at his station; and
(2) All parts of the compartment are
easily accessible in flight.

[Doc. No. 28154, 60 FR 65928, Dec. 20, 1995]

Section 121.213

[Reserved]

Section 121.215

Cabin interiors.

(a) Except as provided in Section 121.312,
each compartment used by the crew or
passengers must meet the requirements of this section.
(b) Materials must be at least flash
resistant.
(c) The wall and ceiling linings and
the covering of upholstering, floors,
and furnishings must be flame resistant.
(d) Each compartment where smoking is to be allowed must be equipped
with self-contained ash trays that are
completely removable and other compartments must be placarded against
smoking.
(e) Each receptacle for used towels,
papers, and wastes must be of fire-resistant material and must have a cover
or other means of containing possible
fires started in the receptacles.
[Doc. No. 6258, 29 FR 19202, Dec. 31, 1964, as
amended by Amdt. 121-84, 37 FR 3974, Feb. 24,
1972]

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