Federal Aviation Administration, DOT

Pt. 125, App. A

extending along at least 70 degrees of arc at
a radius approximately equal to 3-4 of the
handle length; and
(ii) The word  - open -  in red letters 1 inch
high placed horizontally near the head of the
arrow.
(2) For a passenger-carrying airplane for
which the application for the type certificate
was filed on or after May 1, 1972, the location
of each passenger emergency exit operating
handle and instructions for opening the exit
must be shown in accordance with the requirements under which the airplane was
type certificated. On these airplanes, no operating handle or operating handle cover
may continue to be used if its luminescence
(brightness) decreases to below 100 microlamberts.
(f) Emergency exit access. Access to emergency exits must be provided as follows for
each passenger-carrying airplane:
(1) Each passageway between individual
passenger areas, or leading to a Type I or
Type II emergency exit, must be unobstructed and at least 20 inches wide.
(2) There must be enough space next to
each Type I or Type II emergency exit to
allow a crewmember to assist in the evacuation of passengers without reducing the unobstructed width of the passageway below
that required in paragraph (f)(1) of this section. However, the Administrator may authorize deviation from this requirement for
an airplane certificated under the provisions
of part 4b of the Civil Air Regulations in effect before December 20, 1951, if the Administrator finds that special circumstances exist
that provide an equivalent level of safety.
(3) There must be access from the main
aisle to each Type III and Type IV exit. The
access from the aisle to these exits must not
be obstructed by seats, berths, or other protrusions in a manner that would reduce the
effectiveness of the exit. In addition - 
(i) For an airplane for which the application for the type certificate was filed prior to
May 1, 1972, the access must meet the requirements of Section 25.813(c) of this chapter in effect on April 30, 1972; and
(ii) For an airplane for which the application for the type certificate was filed on or
after May 1, 1972, the access must meet the
emergency exit access requirements under
which the airplane was certificated.
(4) 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 not be obstructed. However, curtains
may be used if they allow free entry through
the passageway.
(5) No door may be installed in any partition between passenger compartments.
(6) 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,
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 interia 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.
 - Reflectance -  is the ratio of the luminous
flux reflected by a body to the luminous flux
it receives.
(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.
(h) Exterior emergency lighting and escape
route. (1) 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.

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