Federal Aviation Administration, DOT

Section 25.809

the airplane, meeting at least the dimensions of a Type IV exit.
(2) For airplanes that have a passenger seating configuration of 10 of
more seats, excluding pilot seats, one
exit above the waterline in a side of the
airplane, meeting at least the dimensions of a Type III exit for each unit (or
part of a unit) of 35 passenger seats,
but no less than two such exits in the
passenger cabin, with one on each side
of the airplane. The passenger seat/
exit ratio may be increased through
the use of larger exits, or other means,
provided it is shown that the evacuation capability during ditching has
been improved accordingly.
(3) If it is impractical to locate side
exits above the waterline, the side
exits must be replaced by an equal
number of readily accessible overhead
hatches of not less than the dimensions
of a Type III exit, except that for airplanes with a passenger configuration
of 35 or fewer seats, excluding pilot
seats, the two required Type III side
exits need be replaced by only one
overhead hatch.
(j) Flightcrew emergency exits. For airplanes in which the proximity of passenger
emergency
exits
to
the
flightcrew area does not offer a convenient and readily accessible means of
evacuation of the flightcrew, and for
all airplanes having a passenger seating capacity greater than 20, flightcrew
exits shall be located in the flightcrew
area. Such exits shall be of sufficient
size and so located as to permit rapid
evacuation by the crew. One exit shall
be provided on each side of the airplane; or, alternatively, a top hatch
shall be provided. Each exit must encompass an unobstructed rectangular
opening of at least 19 by 20 inches unless satisfactory exit utility can be
demonstrated by a typical crewmember.

spaschal on DSK3GDR082PROD with CFR

[Amdt. 25-72, 55 FR 29781, July 20, 1990, as
amended by Amdt. 25-88, 61 FR 57956, Nov. 8,
1996; 62 FR 1817, Jan. 13, 1997; Amdt. 25-94, 63
FR 8848, Feb. 23, 1998; 63 FR 12862, Mar. 16,
1998; Amdt. 25-114, 69 FR 24502, May 3, 2004]

Section 25.809 Emergency exit arrangement.
(a) Each emergency exit, including
each flightcrew emergency exit, must
be a moveable door or hatch in the external walls of the fuselage, allowing

an unobstructed opening to the outside. In addition, each emergency exit
must have means to permit viewing of
the conditions outside the exit when
the exit is closed. The viewing means
may be on or adjacent to the exit provided no obstructions exist between the
exit and the viewing means. Means
must also be provided to permit viewing of the likely areas of evacuee
ground contact. The likely areas of
evacuee ground contact must be
viewable during all lighting conditions
with the landing gear extended as well
as in all conditions of landing gear collapse.
(b) Each emergency exit must be
openable from the inside and the outside except that sliding window emergency exits in the flight crew area need
not be openable from the outside if
other approved exits are convenient
and readily accessible to the flight
crew area. Each emergency exit must
be capable of being opened, when there
is no fuselage deformation - 
(1) With the airplane in the normal
ground attitude and in each of the attitudes corresponding to collapse of one
or more legs of the landing gear; and
(2) Within 10 seconds measured from
the time when the opening means is actuated to the time when the exit is
fully opened.
(3) Even though persons may be
crowded against the door on the inside
of the airplane.
(c) The means of opening emergency
exits must be simple and obvious; may
not require exceptional effort; and
must be arranged and marked so that
it can be readily located and operated,
even in darkness. Internal exit-opening
means involving sequence operations
(such as operation of two handles or
latches, or the release of safety
catches) may be used for flightcrew
emergency exits if it can be reasonably
established that these means are simple and obvious to crewmembers
trained in their use.
(d) If a single power-boost or single
power-operated system is the primary
system for operating more than one
exit in an emergency, each exit must
be capable of meeting the requirements
of paragraph (b) of this section in the
event of failure of the primary system.
Manual operation of the exit (after

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