Section 121.310

14 CFR Ch. I (1-1-19 Edition)

for takeoff and landing and any passenger emergency exit, such that the
door crosses any egress path (including
aisles, crossaisles and passageways).
(7) If it is necessary to pass through
a doorway separating the passenger
cabin from other areas to reach required emergency exit from any passenger seat, the door must have a
means to latch it in open position, and
the door must be latched open during
each takeoff and landing. 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 Section 25.561(b) of this
chapter.
(g) Exterior exit markings. Each passenger emergency exit and the means
of opening that exit from the outside
must be marked on the outside of the
airplane. There must be a 2-inch colored band outlining each passenger
emergency exit on the side of the fuselage. Each outside marking, including
the band, must be readily distinguishable from the surrounding fuselage
area by contrast in color. The markings must comply with the following:
(1) If the reflectance of the darker
color is 15 percent or less, the reflectance of the lighter color must be at
least 45 percent.
(2) If the reflectance of the darker
color is greater than 15 percent, at
least a 30 percent difference between
its reflectance and the reflectance of
the lighter color must be provided.
(3) Exits that are not in the side of
the fuselage must have the external
means of opening and applicable instructions marked conspicuously in red
or, if red is inconspicuous against the
background color, in bright chrome
yellow and, when the opening means
for such an exit is located on only one
side of the fuselage, a conspicuous
marking to that effect must be provided on the other side. Reflectance is
the ratio of the luminous flux reflected
by a body to the luminous flux it receives.
(h) Exterior emergency lighting and escape route. (1) Except for nontransport
category airplanes certificated after
December 31, 1964, each passenger-carrying airplane must be equipped with

exterior lighting that meets the following requirements:
(i) For an airplane for which the application for the type certificate was
filed prior to May 1, 1972, the requirements of Section 25.812 (f) and (g) of this chapter in effect on April 30, 1972.
(ii) For an airplane for which the application for the type certificate was
filed on or after May 1, 1972, the exterior emergency lighting requirements
under which the airplane was type certificated.
(2) Each passenger-carrying airplane
must be equipped with a slip-resistant
escape route that meets the following
requirements:
(i) For an airplane for which the application for the type certificate was
filed prior to May 1, 1972, the requirements of Section 25.803(e) of this chapter in effect on April 30, 1972.
(ii) For an airplane for which the application for the type certificate was
filed on or after May 1, 1972, the slip-resistant escape route requirements
under which the airplane was type certificated.
(i) Floor level exits. Each floor level
door or exit in the side of the fuselage
(other than those leading into a cargo
or baggage compartment that is not
accessible from the passenger cabin)
that is 44 or more inches high and 20 or
more inches wide, but not wider than
46 inches, each passenger ventral exit
(except the ventral exits on M-404 and
CV-240 airplanes), and each tail cone
exit, must meet the requirements of
this section for floor level emergency
exits. However, the Administrator may
grant a deviation from this paragraph
if he finds that circumstances make
full compliance impractical and that
an acceptable level of safety has been
achieved.
(j) Additional emergency exits. Approved emergency exits in the passenger compartments that are in excess of the minimum number of required emergency exits must meet all
of the applicable provisions of this section except paragraphs (f)(1), (2), and
(3) of this section and must be readily
accessible.
(k) On each large passenger-carrying
turbojet-powered airplane, each ventral exit and tailcone exit must be - 

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