Sec. 25.813 - Emergency exit access.
Each required emergency exit must be
accessible to the passengers and located where it will afford an effective
means of evacuation. Emergency exit distribution must be as uniform as
practical, taking passenger distribution 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 prescribed, and the airplane does
not have a tailcone or ventral emergency exit, the floor level exit must
be in the rearward part of the passenger compartment, 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 leading
from the nearest main aisle to each Type A, Type B, Type C, Type I, or
Type II emergency exit and between individual passenger areas. Each
passageway leading to a Type A or Type B exit must be unobstructed and at
least 36 inches wide. Passageways between individual passenger areas and
those leading to Type I, Type II, or Type C emergency 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
unobstructed cross-aisles at least 20 inches wide between main aisles.
There must be --
(1) A cross-aisle which leads directly
to each passageway between the nearest main aisle and a Type A or B exit;
(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
located 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 crewmember(s)
to assist in the evacuation of passengers must be provided as follows:
(1) The assist space must not reduce the
unobstructed width of the passageway below that required for the exit.
(2) For each Type A or Type B exit,
assist space must be provided at each side of the exit regardless of
whether a means is required by §25.810(a) to assist passengers in
descending to the ground from that exit.
(3) Assist space must be provided at one
side of any other type exit required by §25.810(a) to have a means to
assist passengers in descending to the ground from that exit.
(c) The following must be provided 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 arrangements in which those rows
contain three seats. The width of the passageway must be measured with
adjacent seats adjusted to their most adverse position. The centerline of
the required passageway width must not be displaced more than 5 inches
horizontally from that of the exit.
(ii) In lieu of one 10- or 20-inch
passageway, there may be two passageways, 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 unobstructed 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 passenger
seating configuration of 20 or more, the projected opening of the exit
provided must not be obstructed and there must be no interference in
opening the exit by seats, berths, or other protrusions (including any
seatback in the most adverse position) for a distance from that exit not
less than the width of the narrowest passenger seat installed on the
(ii) For airplanes that have a passenger
seating configuration of 19 or fewer, there may be minor obstructions in
this region, if there are compensating factors to maintain the
effectiveness of the exit.
(3) For each Type III exit, regardless
of the passenger capacity of the airplane 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, including the use of handholds; and
(iii) If the exit is a removable hatch,
state the weight of the hatch and indicate an appropriate location to
place the hatch after removal.
(d) If it is necessary to pass through a
passageway between passenger compartments to reach any required emergency
exit from any seat in the passenger 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 in any
partition between passenger compartments.
(f) If it is necessary to pass through a
doorway separating the passenger cabin from other areas to reach any
required emergency exit from any passenger seat, the door must have a
means to latch it in open position. The latching means must be able to
withstand the loads imposed upon it when the door is subjected to the
ultimate inertia forces, relative to the surrounding structure, listed in
[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]