spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 25.811

(2) The assisting means for flightcrew
emergency exits may be a rope or any
other means demonstrated to be suitable for the purpose. If the assisting
means is a rope, or an approved device
equivalent to a rope, it must be - 
(i) Attached to the fuselage structure
at or above the top of the emergency
exit opening, or, for a device at a pilot-s emergency exit window, at another approved location if the stowed
device, or its attachment, would reduce
the pilot-s view in flight;
(ii) Able (with its attachment) to
withstand a 400-pound static load.
(b) Assist means from the cabin to
the wing are required for each type A
or Type B exit located above the wing
and having a stepdown unless the exit
without an assist-means can be shown
to have a rate of passenger egress at
least equal to that of the same type of
non over-wing exit. If an assist means
is required, it must be automatically
deployed and automatically erected
concurrent with the opening of the
exit. In the case of assist means installed at Type C exits, it must be selfsupporting within 10 seconds from the
time the opening means of the exits is
actuated. For all other exit types, it
must be self-supporting 6 seconds after
deployment is begun.
(c) An escape route must be established from each overwing emergency
exit, and (except for flap surfaces suitable as slides) covered with a slip resistant surface. Except where a means
for channeling the flow of evacuees is
provided - 
(1) The escape route from each Type
A or Type B passenger emergency exit,
or any common escape route from two
Type III passenger emergency exits,
must be at least 42 inches wide; that
from any other passenger emergency
exit must be at least 24 inches wide;
and
(2) The escape route surface must
have a reflectance of at least 80 percent, and must be defined by markings
with a surface-to-marking contrast
ratio of at least 5:1.
(d) Means must be provided to assist
evacuees to reach the ground for all
Type C exits located over the wing and,
if the place on the airplane structure
at which the escape route required in
paragraph (c) of this section termi-

nates is more than 6 feet from the
ground with the airplane on the ground
and the landing gear extended, for all
other exit types.
(1) If the escape route is over the
flap, the height of the terminal edge
must be measured with the flap in the
takeoff or landing position, whichever
is higher from the ground.
(2) The assisting means must be usable and self-supporting with one or
more landing gear legs collapsed and
under a 25-knot wind directed from the
most critical angle.
(3) The assisting means provided for
each escape route leading from a Type
A or B emergency exit must be capable
of carrying simultaneously two parallel lines of evacuees; and, the assisting means leading from any other exit
type must be capable of carrying as
many parallel lines of evacuees as
there are required escape routes.
(4) The assisting means provided for
each escape route leading from a Type
C exit must be automatically erected
within 10 seconds from the time the
opening means of the exit is actuated,
and that provided for the escape route
leading from any other exit type must
be automatically erected within 10 seconds 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 effectiveness of passenger emergency egress will
not be impaired:
(1) The door, integral stair, and operating mechanism have been subjected
to the inertia forces specified in
Section 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 attitudes 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]

Section 25.811 Emergency exit marking.
(a) Each passenger emergency exit,
its means of access, and its means of
opening
must
be
conspicuously
marked.

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