Section 27.779

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

the cockpit structure or the pilot-s
clothing when pilots from 5-2- to 6-0- in
height are seated.
Section 27.779 Motion and effect of cockpit
controls.
Cockpit controls must be designed so
that they operate in accordance with
the following movements and actuation:
(a) Flight controls, including the collective pitch control, must operate
with a sense of motion which corresponds to the effect on the rotorcraft.
(b) Twist-grip engine power controls
must be designed so that, for lefthand
operation, the motion of the pilot-s
hand is clockwise to increase power
when the hand is viewed from the edge
containing the index finger. Other engine power controls, excluding the collective control, must operate with a
forward motion to increase power.
(c) Normal landing gear controls
must operate downward to extend the
landing gear.
[Amdt. 27-21, 49 FR 44434, Nov. 6, 1984]

Section 27.783

Doors.

(a) Each closed cabin must have at
least one adequate and easily accessible external door.
(b) Each external door must be located where persons using it will not be
endangered by the rotors, propellers,
engine intakes, and exhausts when appropriate operating procedures are
used. If opening procedures are required, they must be marked inside, on
or adjacent to the door opening device.
[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as
amended by Amdt. 27-26, 55 FR 8001, Mar. 6,
1990]

spaschal on DSK3GDR082PROD with CFR

Section 27.785 Seats, berths, litters, safety
belts, and harnesses.
(a) Each seat, safety belt, harness,
and adjacent part of the rotorcraft at
each station designated for occupancy
during takeoff and landing must be free
of potentially injurious objects, sharp
edges, protuberances, and hard surfaces
and must be designed so that a person
making proper use of these facilities
will not suffer serious injury in an
emergency landing as a result of the
static inertial load factors specified in

Section 27.561(b) and dynamic conditions specified in Section 27.562.
(b) Each occupant must be protected
from serious head injury by a safety
belt plus a shoulder harness that will
prevent the head from contacting any
injurious object except as provided for
in Section 27.562(c)(5). A shoulder harness
(upper torso restraint), in combination
with the safety belt, constitutes a
torso restraint system as described in
TSO-C114.
(c) Each occupant-s seat must have a
combined safety belt and shoulder harness with a single-point release. Each
pilot-s combined safety belt and shoulder harness must allow each pilot when
seated with safety belt and shoulder
harness fastened to perform all functions necessary for flight operations.
There must be a means to secure belts
and harnesses, when not in use, to prevent interference with the operation of
the rotorcraft and with rapid egress in
an emergency.
(d) If seat backs do not have a firm
handhold, there must be hand grips or
rails along each aisle to enable the occupants to steady themselves while
using the aisle in moderately rough
air.
(e) Each projecting object that could
injure persons seated or moving about
in the rotorcraft in normal flight must
be padded.
(f) Each seat and its supporting
structure must be designed for an occupant weight of at least 170 pounds considering the maximum load factors, inertial forces, and reactions between occupant, seat, and safety belt or harness
corresponding with the applicable
flight and ground load conditions, including the emergency landing conditions of Section 27.561(b). In addition - 
(1) Each pilot seat must be designed
for the reactions resulting from the application of the pilot forces prescribed
in Section 27.397; and
(2) The inertial forces prescribed in
Section 27.561(b) must be multiplied by a factor of 1.33 in determining the strength
of the attachment of - 
(i) Each seat to the structure; and
(ii) Each safety belt or harness to the
seat or structure.
(g) When the safety belt and shoulder
harness are combined, the rated
strength of the safety belt and shoulder

520

VerDate Sep<11>2014

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00530

Fmt 8010

Sfmt 8010

Y:\SGML\247046.XXX

247046