Sec. 25.773 - Pilot compartment view.
(a) Nonprecipitation conditions.
For nonprecipitation conditions, the following apply:
(1) Each pilot compartment must be
arranged to give the pilots a sufficiently extensive, clear, and
undistorted view, to enable them to safely perform any maneuvers within
the operating limitations of the airplane, including taxiing takeoff,
approach, and landing.
(2) Each pilot compartment must be free
of glare and reflection that could interfere with the normal duties of the
minimum flight crew (established under §25.1523). This must be shown in
day and night flight tests under nonprecipitation conditions.
(b) Precipitation conditions. For
precipitation conditions, the following apply:
(1) The airplane must have a means to
maintain a clear portion of the windshield, during precipitation
conditions, sufficient for both pilots to have a sufficiently extensive
view along the flight path in normal flight attitudes of the airplane.
This means must be designed to function, without continuous attention on
the part of the crew, in --
(i) Heavy rain at speeds up to 1.5 VSR1
with lift and drag devices retracted; and
(ii) The icing conditions specified in
§25.1419 if certification with ice protection provisions is requested.
(2) The first pilot must have --
(i) A window that is openable under the
conditions prescribed in paragraph (b)(1) of this section when the cabin
is not pressurized, provides the view specified in that paragraph, and
gives sufficient protection from the elements against impairment of the
pilot's vision; or
(ii) An alternate means to maintain a
clear view under the conditions specified in paragraph (b)(1) of this
section, considering the probable damage due to a severe hail encounter.
(c) Internal windshield and window
fogging. The airplane must have a means to prevent fogging of the
internal portions of the windshield and window panels over an area which
would provide the visibility specified in paragraph (a) of this section
under all internal and external ambient conditions, including
precipitation conditions, in which the airplane is intended to be
(d) Fixed markers or other guides must
be installed at each pilot station to enable the pilots to position
themselves in their seats for an optimum combination of outside visibility
and instrument scan. If lighted markers or guides are used they must
comply with the requirements specified in §25.1381.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-23, 35 FR 5676, Apr. 8, 1970; Amdt. 25-46, 43 FR
50595, Oct. 30, 1978; Amdt. 25-72, 55 FR 29778, July 20, 1990; Amdt. 1-49,
67 FR 70827, Nov. 26, 2002]