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Federal Aviation Administration, DOT 

§ 29.853 

(1) Each hand fire extinguisher must 

be approved. 

(2) The kinds and quantities of each 

extinguishing agent used must be ap-
propriate to the kinds of fires likely to 
occur where that agent is used. 

(3) Each extinguisher for use in a per-

sonnel compartment must be designed 
to minimize the hazard of toxic gas 
concentrations. 

(b) 

Built-in fire extinguishers. 

If a 

built-in fire extinguishing system is re-
quired— 

(1) The capacity of each system, in 

relation to the volume of the compart-
ment where used and the ventilation 
rate, must be adequate for any fire 
likely to occur in that compartment. 

(2) Each system must be installed so 

that— 

(i) No extinguishing agent likely to 

enter personnel compartments will be 
present in a quantity that is hazardous 
to the occupants; and 

(ii) No discharge of the extinguisher 

can cause structural damage. 

§ 29.853

Compartment interiors. 

For each compartment to be used by 

the crew or passengers— 

(a) The materials (including finishes 

or decorative surfaces applied to the 
materials) must meet the following 
test criteria as applicable: 

(1) Interior ceiling panels, interior 

wall panels, partitions, galley struc-
ture, large cabinet walls, structural 
flooring, and materials used in the con-
struction of stowage compartments 
(other than underseat stowage com-
partments and compartments for stow-
ing small items such as magazines and 
maps) must be self-extinguishing when 
tested vertically in accordance with 
the applicable portions of appendix F 
of Part 25 of this chapter, or other ap-
proved equivalent methods. The aver-
age burn length may not exceed 6 
inches and the average flame time 
after removal of the flame source may 
not exceed 15 seconds. Drippings from 
the test specimen may not continue to 
flame for more than an average of 3 
seconds after falling. 

(2) Floor covering, textiles (including 

draperies and upholstery), seat cush-
ions, padding, decorative and non-
decorative coated fabrics, leather, 
trays and galley furnishings, electrical 

conduit, thermal and acoustical insula-
tion and insulation covering, air duct-
ing, joint and edge covering, cargo 
compartment liners, insulation blan-
kets, cargo covers, and transparencies, 
molded and thermoformed parts, air 
ducting joints, and trim strips (decora-
tive and chafing) that are constructed 
of materials not covered in paragraph 
(a)(3) of this section, must be self ex-
tinguishing when tested vertically in 
accordance with the applicable portion 
of appendix F of Part 25 of this chapter, 
or other approved equivalent methods. 
The average burn length may not ex-
ceed 8 inches and the average flame 
time after removal of the flame source 
may not exceed 15 seconds. Drippings 
from the test specimen may not con-
tinue to flame for more than an aver-
age of 5 seconds after falling. 

(3) Acrylic windows and signs, parts 

constructed in whole or in part of 
elastometric materials, edge lighted 
instrument assemblies consisting of 
two or more instruments in a common 
housing, seat belts, shoulder harnesses, 
and cargo and baggage tiedown equip-
ment, including containers, bins, pal-
lets, etc., used in passenger or crew 
compartments, may not have an aver-
age burn rate greater than 2.5 inches 
per minute when tested horizontally in 
accordance with the applicable por-
tions of appendix F of Part 25 of this 
chapter, or other approved equivalent 
methods. 

(4) Except for electrical wire and 

cable insulation, and for small parts 
(such as knobs, handles, rollers, fas-
teners, clips, grommets, rub strips, pul-
leys, and small electrical parts) that 
the Administrator finds would not con-
tribute significantly to the propaga-
tion of a fire, materials in items not 
specified in paragraphs (a)(1), (a)(2), or 
(a)(3) of this section may not have a 
burn rate greater than 4 inches per 
minute when tested horizontally in ac-
cordance with the applicable portions 
of appendix F of Part 25 of this chapter, 
or other approved equivalent methods. 

(b) In addition to meeting the re-

quirements of paragraph (a)(2), seat 
cushions, except those on flight crew-
member seats, must meet the test re-
quirements of Part II of appendix F of 
Part 25 of this chapter, or equivalent. 

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