449
Federal Aviation Administration, DOT
§ 25.807
inches and a step-down outside the air-
plane of not more than 36 inches.
(5)
Ventral. This type is an exit from
the passenger compartment through
the pressure shell and the bottom fuse-
lage skin. The dimensions and physical
configuration of this type of exit must
allow at least the same rate of egress
as a Type I exit with the airplane in
the normal ground attitude, with land-
ing gear extended.
(6)
Tailcone. This type is an aft exit
from the passenger compartment
through the pressure shell and through
an openable cone of the fuselage aft of
the pressure shell. The means of open-
ing the tailcone must be simple and ob-
vious and must employ a single oper-
ation.
(7)
Type A. This type is a floor-level
exit with a rectangular opening of not
less than 42 inches wide by 72 inches
high, with corner radii not greater
than seven inches.
(8)
Type B. This type is a floor-level
exit with a rectangular opening of not
less than 32 inches wide by 72 inches
high, with corner radii not greater
than six inches.
(9)
Type C. This type is a floor-level
exit with a rectangular opening of not
less than 30 inches wide by 48 inches
high, with corner radii not greater
than 10 inches.
(b)
Step down distance. Step down dis-
tance, as used in this section, means
the actual distance between the bot-
tom of the required opening and a usa-
ble foot hold, extending out from the
fuselage, that is large enough to be ef-
fective without searching by sight or
feel.
(c)
Over-sized exits. Openings larger
than those specified in this section,
whether or not of rectangular shape,
may be used if the specified rectan-
gular opening can be inscribed within
the opening and the base of the in-
scribed rectangular opening meets the
specified step-up and step-down
heights.
(d)
Asymmetry. Exits of an exit pair
need not be diametrically opposite
each other nor of the same size; how-
ever, the number of passenger seats
permitted under paragraph (g) of this
section is based on the smaller of the
two exits.
(e)
Uniformity. Exits must be distrib-
uted as uniformly as practical, taking
into account passenger seat distribu-
tion.
(f)
Location. (1) Each required pas-
senger emergency exit must be acces-
sible to the passengers and located
where it will afford the most effective
means of passenger evacuation.
(2) 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 exits must be in
the rearward part of the passenger
compartment unless another location
affords a more effective means of pas-
senger evacuation.
(3) If more than one floor-level exit
per side is prescribed, and the airplane
does not have a combination cargo and
passenger configuration, at least one
floor-level exit must be located in each
side near each end of the cabin.
(4) For an airplane that is required to
have more than one passenger emer-
gency exit for each side of the fuselage,
no passenger emergency exit shall be
more than 60 feet from any adjacent
passenger emergency exit on the same
side of the same deck of the fuselage,
as measured parallel to the airplane’s
longitudinal axis between the nearest
exit edges.
(g)
Type and number required. The
maximum number of passenger seats
permitted depends on the type and
number of exits installed in each side
of the fuselage. Except as further re-
stricted in paragraphs (g)(1) through
(g)(9) of this section, the maximum
number of passenger seats permitted
for each exit of a specific type installed
in each side of the fuselage is as fol-
lows:
Type A
110
Type B
75
Type C
55
Type I
45
Type II
40
Type III
35
Type IV
9
(1) For a passenger seating configura-
tion of 1 to 9 seats, there must be at
least one Type IV or larger overwing
exit in each side of the fuselage or, if
overwing exits are not provided, at
least one exit in each side that meets
the minimum dimensions of a Type III
exit.
VerDate Mar<15>2010
10:12 Mar 18, 2014
Jkt 232046
PO 00000
Frm 00459
Fmt 8010
Sfmt 8010
Y:\SGML\232046.XXX
232046
pmangrum on DSK3VPTVN1PROD with CFR