(c) Passenger emergency exits; other than side-of-fuselage. In
addition to the requirements of paragraph (b) of this section --
(1) There must be enough openings in the top, bottom, or ends of the
fuselage to allow evacuation with the rotorcraft on its side; or
(2) The probability of the rotorcraft coming to rest on its side in a
crash landing must be extremely remote.
(d) Ditching emergency exits for passengers. If certification
with ditching provisions is requested, ditching emergency exits must be
provided in accordance with the following requirements and must be proven
by test, demonstration, or analysis unless the emergency exits required by
paragraph (b) of this section already meet these requirements.
(1) For rotorcraft that have a passenger seating configuration,
excluding pilots seats, of nine seats or less, one exit above the
waterline in each side of the rotorcraft, meeting at least the dimensions
of a Type IV exit.
(2) For rotorcraft that have a passenger seating configuration,
excluding pilots seats, of 10 seats or more, one exit above the waterline
in a side of the rotorcraft 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
rotorcraft. However, where it has been shown through analysis, ditching
demonstrations, or any other tests found necessary by the Administrator,
that the evacuation capability of the rotorcraft during ditching is
improved by the use of larger exits, or by other means, the passenger seat
to exit ratio may be increased.
(3) Flotation devices, whether stowed or deployed, may not interfere
with or obstruct the exits.
(e) Ramp exits. One Type I exit only, or one Type II exit only,
that is required in the side of the fuselage under paragraph (b) of this
section, may be installed instead in the ramp of floor ramp rotorcraft if
(1) Its installation in the side of the fuselage is impractical; and
(2) Its installation in the ramp meets §29.813.
(f) Tests. The proper functioning of each emergency exit must be
shown by test.