title-14-part-25-sec25-813

297

Federal Aviation Administration, DOT

§ 25.813

serves no other assist means, is inde-
pendent of the airplane’s main emer-
gency lighting system, and is auto-
matically activated when the assist
means is erected, the lighting provi-
sions—

(i) May not be adversely affected by

stowage; and

(ii) Must provide illumination of not

less than 0.03 foot-candle (measured
normal to the direction of incident
light) at the ground and of the erected
assist means where an evacuee would
normally make first contact with the
ground, with the airplane in each of
the attitudes corresponding to the col-
lapse of one or more legs of the landing
gear.

(i) The energy supply to each emer-

gency lighting unit must provide the
required level of illumination for at
least 10 minutes at the critical ambient
conditions after emergency landing.

(j) If storage batteries are used as the

energy supply for the emergency light-
ing system, they may be recharged
from the airplane’s main electric power
system:

Provided, That, the charging

circuit is designed to preclude inad-
vertent battery discharge into charg-
ing circuit faults.

(k) Components of the emergency

lighting system, including batteries,
wiring relays, lamps, and switches
must be capable of normal operation
after having been subjected to the iner-
tia forces listed in § 25.561(b).

(l) The emergency lighting system

must be designed so that after any sin-
gle transverse vertical separation of
the fuselage during crash landing—

(1) Not more than 25 percent of all

electrically illuminated emergency
lights required by this section are ren-
dered inoperative, in addition to the
lights that are directly damaged by the
separation;

(2) Each electrically illuminated exit

sign required under § 25.811(d)(2) re-
mains operative exclusive of those that
are directly damaged by the separa-
tion; and

(3) At least one required exterior

emergency light for each side of the
airplane remains operative exclusive of

those that are directly damaged by the
separation.

[Amdt. 25–15, 32 FR 13265, Sept. 20, 1967, as
amended by Amdt. 25–28, 36 FR 16899, Aug. 26,
1971; Amdt. 25–32, 37 FR 3971, Feb. 24, 1972;
Amdt. 25–46, 43 FR 50597, Oct. 30, 1978; Amdt.
25–58, 49 FR 43186, Oct. 26, 1984; Amdt. 25–88,
61 FR 57958, Nov. 8, 1996; Amdt. 25–116, 69 FR
62788, Oct. 27, 2004; Amdt. 25–128, 74 FR 25645,
May 29, 2009]

§ 25.813

Emergency exit access.

Each required emergency exit must

be accessible to the passengers and lo-
cated where it will afford an effective
means of evacuation. Emergency exit
distribution must be as uniform as
practical, taking passenger distribu-
tion into account; however, the size
and location of exits on both sides of
the cabin need not be symmetrical. If
only one floor level exit per side is pre-
scribed, and the airplane does not have
a tailcone or ventral emergency exit,
the floor level exit must be in the rear-
ward part of the passenger compart-
ment, unless another location affords a
more effective means of passenger
evacuation. Where more than one floor
level exit per side is prescribed, at
least one floor level exit per side must
be located near each end of the cabin,
except that this provision does not
apply to combination cargo/passenger
configurations. In addition—

(a) There must be a passageway lead-

ing from the nearest main aisle to each
Type A, Type B, Type C, Type I, or
Type II emergency exit and between in-
dividual passenger areas. Each passage-
way leading to a Type A or Type B exit
must be unobstructed and at least 36
inches wide. Passageways between indi-
vidual passenger areas and those lead-
ing to Type I, Type II, or Type C emer-
gency exits must be unobstructed and
at least 20 inches wide. Unless there
are two or more main aisles, each Type
A or B exit must be located so that
there is passenger flow along the main
aisle to that exit from both the forward
and aft directions. If two or more main
aisles are provided, there must be un-
obstructed cross-aisles at least 20
inches wide between main aisles. There
must be—

VerDate Sep<11>2014

09:06 Jun 28, 2024

Jkt 262046

PO 00000

Frm 00307

Fmt 8010

Sfmt 8010

Y:\SGML\262046.XXX

262046

jspears on DSK121TN23PROD with CFR

298

14 CFR Ch. I (1–1–24 Edition)

§ 25.813

(1) A cross-aisle which leads directly

to each passageway between the near-
est main aisle and a Type A or B exit;
and

(2) A cross-aisle which leads to the

immediate vicinity of each passageway
between the nearest main aisle and a
Type 1, Type II, or Type III exit; except
that when two Type III exits are lo-
cated within three passenger rows of
each other, a single cross-aisle may be
used if it leads to the vicinity between
the passageways from the nearest main
aisle to each exit.

(b) Adequate space to allow crew-

member(s) to assist in the evacuation
of passengers must be provided as fol-
lows:

(1) Each assist space must be a rec-

tangle on the floor, of sufficient size to
enable a crewmember, standing erect,
to effectively assist evacuees. The as-
sist space must not reduce the unob-
structed width of the passageway below
that required for the exit.

(2) For each Type A or B exit, assist

space must be provided at each side of
the exit regardless of whether an assist
means is required by § 25.810(a).

(3) For each Type C, I or II exit in-

stalled in an airplane with seating for
more than 80 passengers, an assist
space must be provided at one side of
the passageway regardless of whether
an assist means is required by
§ 25.810(a).

(4) For each Type C, I or II exit, an

assist space must be provided at one
side of the passageway if an assist
means is required by § 25.810(a).

(5) For any tailcone exit that quali-

fies for 25 additional passenger seats
under the provisions of § 25.807(g)(9)(ii),
an assist space must be provided, if an
assist means is required by § 25.810(a).

(6) There must be a handle, or han-

dles, at each assist space, located to
enable the crewmember to steady him-
self or herself:

(i) While manually activating the as-

sist means (where applicable) and,

(ii) While assisting passengers during

an evacuation.

for each Type III or Type IV exit—(1)
There must be access from the nearest
aisle to each exit. In addition, for each
Type III exit in an airplane that has a

passenger seating configuration of 60 or
more—

(i) Except as provided in paragraph

(c)(1)(ii), the access must be provided
by an unobstructed passageway that is
at least 10 inches in width for interior
arrangements in which the adjacent
seat rows on the exit side of the aisle
contain no more than two seats, or 20
inches in width for interior arrange-
ments in which those rows contain
three seats. The width of the passage-
way must be measured with adjacent
seats adjusted to their most adverse
position. The centerline of the required
passageway width must not be dis-
placed more than 5 inches horizontally
from that of the exit.

(ii) In lieu of one 10- or 20-inch pas-

sageway, there may be two passage-
ways, between seat rows only, that
must be at least 6 inches in width and
lead to an unobstructed space adjacent
to each exit. (Adjacent exits must not
share a common passageway.) The
width of the passageways must be
measured with adjacent seats adjusted
to their most adverse position. The un-
obstructed space adjacent to the exit
must extend vertically from the floor
to the ceiling (or bottom of sidewall
stowage bins), inboard from the exit for
a distance not less than the width of
the narrowest passenger seat installed
on the airplane, and from the forward
edge of the forward passageway to the
aft edge of the aft passageway. The exit
opening must be totally within the fore
and aft bounds of the unobstructed
space.

(2) In addition to the access—
(i) For airplanes that have a pas-

senger seating configuration of 20 or
more, the projected opening of the exit
provided must not be obstructed and
there must be no interference in open-
ing the exit by seats, berths, or other
protrusions (including any seatback in
the most adverse position) for a dis-
tance from that exit not less than the
width of the narrowest passenger seat
installed on the airplane.

(ii) For airplanes that have a pas-

senger seating configuration of 19 or
fewer, there may be minor obstructions
in this region, if there are compen-
sating factors to maintain the effec-
tiveness of the exit.

VerDate Sep<11>2014

09:06 Jun 28, 2024

Jkt 262046

PO 00000

Frm 00308

Fmt 8010

Sfmt 8010

Y:\SGML\262046.XXX

262046

jspears on DSK121TN23PROD with CFR

299

Federal Aviation Administration, DOT

§ 25.819

(3) For each Type III exit, regardless

of the passenger capacity of the air-
plane in which it is installed, there
must be placards that—

(i) Are readable by all persons seated

adjacent to and facing a passageway to
the exit;

(ii) Accurately state or illustrate the

proper method of opening the exit, in-
cluding the use of handholds; and

(iii) If the exit is a removable hatch,

state the weight of the hatch and indi-
cate an appropriate location to place
the hatch after removal.

(d) If it is necessary to pass through

a passageway between passenger com-
partments to reach any required emer-
gency exit from any seat in the pas-
senger cabin, the passageway must be
unobstructed. However, curtains may
be used if they allow free entry
through the passageway.

(e) No door may be installed between

any passenger seat that is occupiable
for takeoff and landing and any pas-
senger emergency exit, such that the
door crosses any egress path (including
aisles, crossaisles and passageways).

(f) If it is necessary to pass through a

doorway separating any crewmember
seat (except those seats on the
flightdeck), occupiable for takeoff and
landing, from any emergency exit, the
door must have a means to latch it in
the open position. The latching means
must be able to withstand the loads
imposed upon it when the door is sub-
jected to the ultimate inertia forces,
relative to the surrounding structure,
listed in § 25.561(b).

[Amdt. 25–1, 30 FR 3204, Mar. 9, 1965, as
amended by Amdt. 25–15, 32 FR 13265, Sept.
20, 1967; Amdt. 25–32, 37 FR 3971, Feb. 24, 1972;
Amdt. 25–46, 43 FR 50597, Oct. 30, 1978; Amdt.
25–72, 55 FR 29783, July 20, 1990; Amdt. 25–76,
57 FR 19244, May 4, 1992; Amdt. 25–76, 57 FR
29120, June 30, 1992; Amdt. 25–88, 61 FR 57958,
Nov. 8, 1996; Amdt. 25–116, 69 FR 62788, Oct.
27, 2004; Amdt. 25–128, 74 FR 25645, May 29,
2009]

§ 25.815

Width of aisle.

The passenger aisle width at any

point between seats must equal or ex-
ceed the values in the following table:

Passenger seating capacity

Minimum passenger

aisle width (inches)

Less than

25 in. from

floor

25 in. and