110 

14 CFR Ch. I (1–1–19 Edition) 

§ 121.310 

for takeoff and landing and any pas-
senger 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 re-
quired emergency exit from any pas-
senger 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 § 25.561(b) of this 
chapter. 

(g) 

Exterior exit markings. 

Each pas-

senger 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 col-
ored band outlining each passenger 
emergency exit on the side of the fuse-
lage. Each outside marking, including 
the band, must be readily distinguish-
able from the surrounding fuselage 
area by contrast in color. The mark-
ings must comply with the following: 

(1) If the reflectance of the darker 

color is 15 percent or less, the reflec-
tance 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 in-
structions 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 pro-
vided on the other side. 

Reflectance 

is 

the ratio of the luminous flux reflected 
by a body to the luminous flux it re-
ceives. 

(h) 

Exterior emergency lighting and es-

cape route. 

(1) Except for nontransport 

category airplanes certificated after 
December 31, 1964, each passenger-car-
rying airplane must be equipped with 

exterior lighting that meets the fol-
lowing requirements: 

(i) For an airplane for which the ap-

plication for the type certificate was 
filed prior to May 1, 1972, the require-
ments of § 25.812 (f) and (g) of this chap-
ter in effect on April 30, 1972. 

(ii) For an airplane for which the ap-

plication for the type certificate was 
filed on or after May 1, 1972, the exte-
rior emergency lighting requirements 
under which the airplane was type cer-
tificated. 

(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 ap-

plication for the type certificate was 
filed prior to May 1, 1972, the require-
ments of § 25.803(e) of this chapter in ef-
fect on April 30, 1972. 

(ii) For an airplane for which the ap-

plication for the type certificate was 
filed on or after May 1, 1972, the slip-re-
sistant escape route requirements 
under which the airplane was type cer-
tificated. 

(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. 

Ap-

proved emergency exits in the pas-
senger compartments that are in ex-
cess of the minimum number of re-
quired emergency exits must meet all 
of the applicable provisions of this sec-
tion 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 ven-
tral exit and tailcone exit must be— 

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