Federal Aviation Administration, DOT

Section 25.853

extinguishers must be conveniently located and evenly distributed in passenger compartments:
Passenger capacity

No. of extinguishers

spaschal on DSK3GDR082PROD with CFR

7 through 30 ...............................
31 through 60 .............................
61 through 200 ...........................
201 through 300 ............................
301 through 400 ............................
401 through 500 ............................
501 through 600 ............................
601 through 700 ............................

1
2
3
4
5
6
7
8

(2) At least one hand fire extinguisher must be conveniently located
in the pilot compartment.
(3) At least one readily accessible
hand fire extinguisher must be available for use in each Class A or Class B
cargo or baggage compartment and in
each Class E or Class F cargo or baggage compartment that is accessible to
crewmembers in flight.
(4) At least one hand fire extinguisher must be located in, or readily
accessible for use in, each galley located above or below the passenger
compartment.
(5) Each hand fire extinguisher must
be approved.
(6) At least one of the required fire
extinguishers located in the passenger
compartment of an airplane with a passenger capacity of at least 31 and not
more than 60, and at least two of the
fire extinguishers located in the passenger compartment of an airplane
with a passenger capacity of 61 or more
must
contain
Halon
1211
(bromochlorodifluoromethane
CBrC1
F2), or equivalent, as the extinguishing
agent. The type of extinguishing agent
used in any other extinguisher required
by this section must be appropriate for
the kinds of fires likely to occur where
used.
(7) The quantity of extinguishing
agent used in each extinguisher required by this section must be appropriate for the kinds of fires likely to
occur where used.
(8) Each extinguisher intended for
use in a personnel compartment must
be designed to minimize the hazard of
toxic gas concentration.
(b) Built-in fire extinguishers. If a
built-in fire extinguisher is provided - 
(1) Each built-in fire extinguishing
system must be installed so that - 

(i) No extinguishing agent likely to
enter personnel compartments will be
hazardous to the occupants; and
(ii) No discharge of the extinguisher
can cause structural damage.
(2) The capacity of each required
built-in fire extinguishing system must
be adequate for any fire likely to occur
in the compartment where used, considering the volume of the compartment and the ventilation rate. The capacity of each system is adequate if
there is sufficient quantity of agent to
extinguish the fire or suppress the fire
anywhere baggage or cargo is placed
within the cargo compartment for the
duration required to land and evacuate
the airplane.
[Amdt. 25-74, 56 FR 15456, Apr. 16, 1991, as
amended by Doc. No. Docket FAA-2014-0001,
Amdt. 25-142, 81 FR 7703, Feb. 16, 2016]

Section 25.853 Compartment interiors.
For each compartment occupied by
the crew or passengers, the following
apply:
(a) Materials (including finishes or
decorative surfaces applied to the materials) must meet the applicable test
criteria prescribed in part I of appendix
F of this part, or other approved equivalent methods, regardless of the passenger capacity of the airplane.
(b) [Reserved]
(c) In addition to meeting the requirements of paragraph (a) of this section, seat cushions, except those on
flight crewmember seats, must meet
the test requirements of part II of appendix F of this part, or other equivalent methods, regardless of the passenger capacity of the airplane.
(d) Except as provided in paragraph
(e) of this section, the following interior components of airplanes with passenger capacities of 20 or more must
also meet the test requirements of
parts IV and V of appendix F of this
part, or other approved equivalent
method, in addition to the flammability requirements prescribed in paragraph (a) of this section:
(1) Interior ceiling and wall panels,
other than lighting lenses and windows;
(2) Partitions, other than transparent
panels needed to enhance cabin safety;
(3) Galley structure, including exposed surfaces of stowed carts and

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