title-14-part-25-sec25-811

294

14 CFR Ch. I (1–1–24 Edition)

§ 25.811

and that provided for the escape route
leading from any other exit type must
be automatically erected within 10 sec-
onds after actuation of the erection
system.

(e) If an integral stair is installed in

a passenger entry door that is qualified
as a passenger emergency exit, the
stair must be designed so that, under
the following conditions, the effective-
ness of passenger emergency egress will
not be impaired:

(1) The door, integral stair, and oper-

ating mechanism have been subjected
to the inertia forces specified in
§ 25.561(b)(3), acting separately relative
to the surrounding structure.

(2) The airplane is in the normal

ground attitude and in each of the atti-
tudes corresponding to collapse of one
or more legs of the landing gear.

[Amdt. 25–72, 55 FR 29782, July 20, 1990, as
amended by Amdt. 25–88, 61 FR 57958, Nov. 8,
1996; 62 FR 1817, Jan. 13, 1997; Amdt. 25–114, 69
FR 24502, May 3, 2004]

§ 25.811

Emergency exit marking.

(a) Each passenger emergency exit,

its means of access, and its means of
opening must be conspicuously
marked.

(b) The identity and location of each

passenger emergency exit must be rec-
ognizable from a distance equal to the
width of the cabin.

the occupants in locating the exits in
conditions of dense smoke.

(d) The location of each passenger

emergency exit must be indicated by a
sign visible to occupants approaching
along the main passenger aisle (or
aisles). There must be—

(1) A passenger emergency exit loca-

tor sign above the aisle (or aisles) near
each passenger emergency exit, or at
another overhead location if it is more
practical because of low headroom, ex-
cept that one sign may serve more
than one exit if each exit can be seen
readily from the sign;

(2) A passenger emergency exit mark-

ing sign next to each passenger emer-
gency exit, except that one sign may
serve two such exits if they both can be
seen readily from the sign; and

(3) A sign on each bulkhead or divider

that prevents fore and aft vision along
the passenger cabin to indicate emer-

gency exits beyond and obscured by the
bulkhead or divider, except that if this
is not possible the sign may be placed
at another appropriate location.

(e) The location of the operating han-

dle and instructions for opening exits
from the inside of the airplane must be
shown in the following manner:

(1) Each passenger emergency exit

must have, on or near the exit, a mark-
ing that is readable from a distance of
30 inches.

(2) Each Type A, Type B, Type C or

Type I passenger emergency exit oper-
ating handle must—

(i) Be self-illuminated with an initial

brightness of at least 160 micro-
lamberts; or

(ii) Be conspicuously located and well

illuminated by the emergency lighting
even in conditions of occupant crowd-
ing at the exit.

(3) [Reserved]
(4) Each Type A, Type B, Type C,

Type I, or Type II passenger emergency
exit with a locking mechanism re-
leased by rotary motion of the handle
must be marked—

(i) With a red arrow, with a shaft at

least three-fourths of an inch wide and
a head twice the width of the shaft, ex-
tending along at least 70 degrees of arc
at a radius approximately equal to
three-fourths of the handle length.

(ii) So that the centerline of the exit

handle is within

1 inch of the pro-

jected point of the arrow when the han-
dle has reached full travel and has re-
leased the locking mechanism, and

(iii) With the word ‘‘open’’ in red let-

ters 1 inch high, placed horizontally
near the head of the arrow.

(f) Each emergency exit that is re-

quired to be openable from the outside,
and its means of opening, must be
marked on the outside of the airplane.
In addition, the following apply:

(1) The outside marking for each pas-

senger emergency exit in the side of
the fuselage must include a 2-inch col-
ored band outlining the exit.

(2) Each outside marking including

the band, must have color contrast to
be readily distinguishable from the sur-
rounding fuselage surface. The contrast
must be such that if the reflectance of
the darker color is 15 percent or less,
the reflectance of the lighter color

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Federal Aviation Administration, DOT

§ 25.812

must be at least 45 percent. ‘‘Reflec-
tance’’ is the ratio of the luminous flux
reflected by a body to the luminous
flux it receives. When the reflectance
of the darker color is greater than 15
percent, at least a 30-percent difference
between its reflectance and the reflec-
tance of the lighter color must be pro-
vided.

(3) In the case of exists other than

those in the side of the fuselage, such
as ventral or tailcone exists, the exter-
nal means of opening, including in-
structions if applicable, must be con-
spicuously marked in red, or bright
chrome yellow if the background color
is such that red is inconspicuous. When
the opening means is located on only
one side of the fuselage, a conspicuous
marking to that effect must be pro-
vided on the other side.

(g) Each sign required by paragraph

(d) of this section may use the word
‘‘exit’’ in its legend in place of the
term ‘‘emergency exit’’.

[Amdt. 25–15, 32 FR 13264, Sept. 20, 1967, as
amended by Amdt. 25–32, 37 FR 3970, Feb. 24,
1972; Amdt. 25–46, 43 FR 50597, Oct. 30, 1978; 43
FR 52495, Nov. 13, 1978; Amdt. 25–79, 58 FR
45229, Aug. 26, 1993; Amdt. 25–88, 61 FR 57958,
Nov. 8, 1996]

§ 25.812

Emergency lighting.

(a) An emergency lighting system,

independent of the main lighting sys-
tem, must be installed. However, the
sources of general cabin illumination
may be common to both the emergency
and the main lighting systems if the
power supply to the emergency light-
ing system is independent of the power
supply to the main lighting system.
The emergency lighting system must
include:

(1) Illuminated emergency exit mark-

ing and locating signs, sources of gen-
eral cabin illumination, interior light-
ing in emergency exit areas, and floor
proximity escape path marking.

(2) Exterior emergency lighting.
(b) Emergency exit signs—
(1) For airplanes that have a pas-

senger seating configuration, excluding
pilot seats, of 10 seats or more must
meet the following requirements:

(i) Each passenger emergency exit lo-

cator sign required by § 25.811(d)(1) and
each passenger emergency exit mark-
ing sign required by § 25.811(d)(2) must

have red letters at least 1

⁄

inches high

on an illuminated white background,
and must have an area of at least 21
square inches excluding the letters.
The lighted background-to-letter con-
trast must be at least 10:1. The letter
height to stroke-width ratio may not
be more than 7:1 nor less than 6:1.
These signs must be internally elec-
trically illuminated with a background
brightness of at least 25 foot-lamberts
and a high-to-low background contrast
no greater than 3:1.

(ii) Each passenger emergency exit

sign required by § 25.811(d)(3) must have
red letters at least 1

⁄

inches high on a

white background having an area of at
least 21 square inches excluding the
letters. These signs must be internally
electrically illuminated or self-illumi-
nated by other than electrical means
and must have an initial brightness of
at least 400 microlamberts. The colors
may be reversed in the case of a sign
that is self-illuminated by other than
electrical means.

(2) For airplanes that have a pas-

senger seating configuration, excluding
pilot seats, of nine seats or less, that
are required by § 25.811(d)(1), (2), and (3)
must have red letters at least 1 inch
high on a white background at least 2
inches high. These signs may be inter-
nally electrically illuminated, or self-
illuminated by other than electrical
means, with an initial brightness of at
least 160 microlamberts. The colors
may be reversed in the case of a sign
that is self-illuminated by other than
electrical means.

senger cabin must be provided so that
when measured along the centerline of
main passenger aisle(s), and cross
aisle(s) between main aisles, at seat
arm-rest height and at 40-inch inter-
vals, the average illumination is not
less than 0.05 foot-candle and the illu-
mination at each 40-inch interval is not
less than 0.01 foot-candle. A main pas-
senger aisle(s) is considered to extend
along the fuselage from the most for-
ward passenger emergency exit or
cabin occupant seat, whichever is far-
ther forward, to the most rearward pas-
senger emergency exit or cabin occu-
pant seat, whichever is farther aft.