Section 29.813

14 CFR Ch. I (1-1-19 Edition)

is independent of the rotorcraft-s main
emergency lighting system, it - 
(i) Must automatically be activated
when the assist means is erected;
(ii) Must provide the illumination required by paragraph (d)(1); and
(iii) May not be adversely affected by
stowage.
(e) The energy supply to each emergency lighting unit must provide the
required level of illumination for at
least 10 minutes at the critical ambient
conditions after an emergency landing.
(f) If storage batteries are used as the
energy supply for the emergency lighting system, they may be recharged
from the rotorcraft-s main electrical
power system provided the charging
circuit is designed to preclude inadvertent battery discharge into charging circuit faults.

spaschal on DSK3GDR082PROD with CFR

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

Section 29.815 Main aisle width.
The main passenger aisle width between seats must equal or exceed the
values in the following table:
Minimum main passenger
aisle width
Passenger seating capacity

Less than
25 inches
from floor
(inches)

10 or less ...................................
11 through 19 ............................
20 or more .................................

12
12
15

Emergency exit access.

(a) Each passageway between passenger compartments, and each passageway leading to Type I and Type II
emergency exits, must be - 
(1) Unobstructed; and
(2) At least 20 inches wide.
(b) For each emergency exit covered
by Section 29.809(f), there must be enough
space adjacent to that exit to allow a
crewmember to assist in the evacuation of passengers without reducing
the unobstructed width of the passageway below that required for that exit.
(c) There must be access from each
aisle to each Type III and Type IV exit,
and
(1) For rotorcraft that have a passenger seating configuration, excluding
pilot seats, of 20 or more, the projected
opening of the exit provided must not
be obstructed by seats, berths, or other
protrusions (including seatbacks in any
position) for a distance from that exit
of not less than the width of the narrowest passenger seat installed on the
rotorcraft;
(2) For rotorcraft that have a passenger seating configuration, excluding
pilot seats, of 19 or less, there may be
minor obstructions in the region described in paragraph (c)(1) of this section, if there are compensating factors

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20
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1 A narrower width not less than 9 inches may be approved
when substantiated by tests found necessary by the
Administrator.

Section 29.831 Ventilation.
(a) Each passenger and crew compartment 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 crewmembers perform their duties without
undue discomfort or fatigue.
(b) Crew and passenger compartment
air must be free from harmful or hazardous concentrations of gases or vapors.
(c) The concentration of carbon monoxide 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 suitable 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.
Section 29.833 Heaters.
Each combustion heater must be approved.
FIRE PROTECTION
Section 29.851 Fire extinguishers.
(a) Hand fire extinguishers. For hand
fire extinguishers the following apply:

618

VerDate Sep<11>2014

25 Inches
and more
from floor
(inches)

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

[Amdt. 29-24, 49 FR 44438, Nov. 6, 1984]

Section 29.813

to maintain the effectiveness of the
exit.

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