Federal Aviation Administration, DOT

Section 27.777

(2) The vertical loads prescribed in
Section 27.521(a), distributed along the length
of the bag over three-quarters of its
projected area.
(b) Rigid floats. Each rigid float must
be able to withstand the vertical, horizontal, and side loads prescribed in
Section 27.521. These loads may be distributed
along the length of the float.
Section 27.755 Hulls.
For each rotorcraft, with a hull and
auxiliary floats, that is to be approved
for both taking off from and landing on
water, the hull and auxiliary floats
must have enough watertight compartments so that, with any single compartment flooded, the buoyancy of the
hull and auxiliary floats (and wheel
tires if used) provides a margin of positive stability great enough to minimize
the probability of capsizing.
PERSONNEL AND CARGO
ACCOMMODATIONS

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Section 27.771 Pilot compartment.
For each pilot compartment - 
(a) The compartment and its equipment must allow each pilot to perform
his duties without unreasonable concentration or fatigue;
(b) If there is provision for a second
pilot, the rotorcraft must be controllable with equal safety from either
pilot seat; and
(c) The vibration and noise characteristics of cockpit appurtenances may
not interfere with safe operation.
Section 27.773 Pilot compartment view.
(a) Each pilot compartment must be
free from glare and reflections that
could interfere with the pilot-s view,
and designed so that - 
(1) Each pilot-s view is sufficiently
extensive, clear, and undistorted for
safe operation; and
(2) Each pilot is protected from the
elements so that moderate rain conditions do not unduly impair his view of
the flight path in normal flight and
while landing.
(b) If certification for night operation is requested, compliance with
paragraph (a) of this section must be
shown by ground or night flight tests.
(c) A vision system with a transparent display surface located in the

pilot-s outside field of view, such as a
head up-display, head mounted display,
or other equivalent display, must meet
the following requirements:
(1) While the vision system display is
in operation, it must compensate for
interference with the pilot-s outside
field of view such that the combination
of what is visible in the display and
what remains visible through and
around it, allows the pilot compartment to satisfy the requirements of
paragraphs (a)(1) and (b) of this section.
(2) The pilot-s view of the external
scene may not be distorted by the
transparent display surface or by the
vision system imagery. When the vision system displays imagery or any
symbology that is referenced to the imagery and outside scene topography,
including attitude symbology, flight
path vector, and flight path angle reference cue, that imagery and symbology must be aligned with, and
scaled to, the external scene.
(3) The vision system must provide a
means to allow the pilot using the display to immediately deactivate and reactivate the vision system imagery, on
demand, without removing the pilot-s
hands from the primary flight and
power controls, or their equivalent.
(4) When the vision system is not in
operation it must permit the pilot
compartment to satisfy the requirements of paragraphs (a)(1) and (b) of
this section.
[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as
amended by Docket FAA-2013-0485, Amdt. 27-
48, 81 FR 90170, Dec. 13, 2016; Docket FAA-
2016-9275, Amdt. 27-50, 83 FR 9423, Mar. 6,
2018]

Section 27.775 Windshields and windows.
Windshields and windows must be
made of material that will not break
into dangerous fragments.
[Amdt. 27-27, 55 FR 38966, Sept. 21, 1990]

Section 27.777 Cockpit controls.
Cockpit controls must be - 
(a) Located to provide convenient operation and to prevent confusion and
inadvertent operation; and
(b) Located and arranged with respect to the pilots- seats so that there
is full and unrestricted movement of
each control without interference from

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