277 

Federal Aviation Administration, DOT 

§ 25.773 

the propellers so that no member of the 
minimum flight crew (established 
under § 25.1523), or part of the controls, 
lies in the region between the plane of 
rotation of any inboard propeller and 
the surface generated by a line passing 
through the center of the propeller hub 
making an angle of five degrees for-
ward or aft of the plane of rotation of 
the propeller. 

(c) If provision is made for a second 

pilot, the airplane must be controllable 
with equal safety from either pilot 
seat. 

(d) The pilot compartment must be 

constructed so that, when flying in 
rain or snow, it will not leak in a man-
ner that will distract the crew or harm 
the structure. 

(e) Vibration and noise characteris-

tics of cockpit equipment may not 
interfere with safe operation of the air-
plane. 

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as 
amended by Amdt. 25–4, 30 FR 6113, Apr. 30, 
1965] 

§ 25.772

Pilot compartment doors. 

For an airplane that has a lockable 

door installed between the pilot com-
partment and the passenger compart-
ment: 

(a) For airplanes with a maximum 

passenger seating configuration of 
more than 20 seats, the emergency exit 
configuration must be designed so that 
neither crewmembers nor passengers 
require use of the flightdeck door in 
order to reach the emergency exits pro-
vided for them; and 

(b) Means must be provided to enable 

flight crewmembers to directly enter 
the passenger compartment from the 
pilot compartment if the cockpit door 
becomes jammed. 

(c) There must be an emergency 

means to enable a flight attendant to 
enter the pilot compartment in the 
event that the flightcrew becomes in-
capacitated. 

[Doc. No. 24344, 55 FR 29777, July 20, 1990, as 
amended by Amdt. 25–106, 67 FR 2127, Jan. 15, 
2002] 

§ 25.773

Pilot compartment view. 

(a) 

Nonprecipitation conditions. For 

nonprecipitation conditions, the fol-
lowing apply: 

(1) Each pilot compartment must be 

arranged to give the pilots a suffi-
ciently extensive, clear, and undis-
torted view, to enable them to safely 
perform any maneuvers within the op-
erating limitations of the airplane, in-
cluding 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 non-
precipitation conditions. 

(b) 

Precipitation conditions. For pre-

cipitation conditions, the following 
apply: 

(1) The airplane must have a means 

to maintain a clear portion of the 
windshield, during precipitation condi-
tions, 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 de-
signed to function, without continuous 
attention on the part of the crew, in— 

(i) Heavy rain at speeds up to 1.5 V

SR1

 

with lift and drag devices retracted; 
and 

(ii) The icing conditions specified in 

Appendix C of this part and the fol-
lowing icing conditions specified in Ap-
pendix O of this part, if certification 
for flight in icing conditions is sought: 

(A) For airplanes certificated in ac-

cordance with § 25.1420(a)(1), the icing 
conditions that the airplane is certified 
to safely exit following detection. 

(B) For airplanes certificated in ac-

cordance with § 25.1420(a)(2), the icing 
conditions that the airplane is certified 
to safely operate in and the icing con-
ditions that the airplane is certified to 
safely exit following detection. 

(C) For airplanes certificated in ac-

cordance with § 25.1420(a)(3) and for air-
planes not subject to § 25.1420, all icing 
conditions. 

(2) No single failure of the systems 

used to provide the view required by 
paragraph (b)(1) of this section must 
cause the loss of that view by both pi-
lots in the specified precipitation con-
ditions. 

(3) The first pilot must have a win-

dow that— 

(i) Is openable under the conditions 

prescribed in paragraph (b)(1) of this 

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