Code of Federal Regulations - Title 14

767

Federal Aviation Administration, DOT

§ 29.853

position) for a distance from that exit
of not less than the width of the nar-
rowest passenger seat installed on the
rotorcraft;

(2) For rotorcraft that have a pas-

senger seating configuration, excluding
pilot seats, of 19 or less, there may be
minor obstructions in the region de-
scribed in paragraph (c)(1) of this sec-
tion, if there are compensating factors
to maintain the effectiveness of the
exit.

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29–12, 41 FR 55472, Dec. 20,
1976]

§ 29.815

Main aisle width.

The main passenger aisle width be-

tween seats must equal or exceed the
values in the following table:

Passenger seating capacity

Minimum main passenger

aisle width

Less than
25 inches

from floor

(inches)

25 Inches

and more
from floor

(inches)

10 or less ...................................

11 through 19 ............................

20 or more .................................

A narrower width not less than 9 inches may be approved

when substantiated by tests found necessary by the
Administrator.

[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29–12, 41 FR 55472, Dec. 20,
1976]

§ 29.831

Ventilation.

(a) Each passenger and crew compart-

ment must be ventilated, and each
crew compartment must have enough
fresh air (but not less than 10 cu. ft. per
minute per crewmember) to let crew-
members perform their duties without
undue discomfort or fatigue.

(b) Crew and passenger compartment

air must be free from harmful or haz-
ardous concentrations of gases or va-
pors.

oxide may not exceed one part in 20,000
parts of air during forward flight. If the
concentration exceeds this value under
other conditions, there must be suit-
able operating restrictions.

(d) There must be means to ensure

compliance with paragraphs (b) and (c)
of this section under any reasonably
probable failure of any ventilating,
heating, or other system or equipment.

§ 29.833

Heaters.

Each combustion heater must be ap-

proved.

IRE

ROTECTION

§ 29.851

Fire extinguishers.

(a)

Hand fire extinguishers. For hand

fire extinguishers the following apply:

(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

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