Federal Aviation Administration, DOT

Section 25.1161

(2) Require a separate and distinct
operation to place the control in the
shutoff position.
[Amdt. 25-23, 35 FR 5677, Apr. 8, 1970, as
amended by Amdt. 25-38, 41 FR 55467, Dec. 20,
1976; Amdt. 25-57, 49 FR 6849, Feb. 23, 1984]

Section 25.1145

Ignition switches.

(a) Ignition switches must control
each engine ignition circuit on each
engine.
(b) There must be means to quickly
shut off all ignition by the grouping of
switches or by a master ignition control.
(c) Each group of ignition switches,
except ignition switches for turbine engines for which continuous ignition is
not required, and each master ignition
control must have a means to prevent
its inadvertent operation.

Section 25.1153

Propeller feathering controls.

(a) There must be a separate propeller feathering control for each propeller. The control must have means to
prevent its inadvertent operation.
(b) If feathering is accomplished by
movement of the propeller pitch or
speed control lever, there must be
means to prevent the inadvertent
movement of this lever to the feathering position during normal operation.
[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-11, 32 FR 6913, May 5,
1967]

[Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 25-40, 42 FR 15044 Mar. 17,
1977]

Section 25.1155 Reverse thrust and propeller
pitch settings below the flight regime.

Section 25.1147

Each control for reverse thrust and
for propeller pitch settings below the
flight regime must have means to prevent its inadvertent operation. The
means must have a positive lock or
stop at the flight idle position and
must require a separate and distinct
operation by the crew to displace the
control from the flight regime (forward
thrust regime for turbojet powered airplanes).

Mixture controls.

(a) If there are mixture controls,
each engine must have a separate control. The controls must be grouped and
arranged to allow - 
(1) Separate control of each engine;
and
(2) Simultaneous control of all engines.
(b) Each intermediate position of the
mixture controls that corresponds to a
normal operating setting must be identifiable by feel and sight.
(c) The mixture controls must be accessible to both pilots. However, if
there is a separate flight engineer station with a control panel, the controls
need be accessible only to the flight engineer.
Section 25.1149 Propeller
controls.

spaschal on DSK3GDR082PROD with CFR

(d) The propeller speed and pitch controls must be to the right of, and at
least one inch below, the pilot-s throttle controls.

speed

and

pitch

(a) There must be a separate propeller speed and pitch control for each
propeller.
(b) The controls must be grouped and
arranged to allow - 
(1) Separate control of each propeller; and
(2) Simultaneous control of all propellers.
(c) The controls must allow synchronization of all propellers.

[Amdt. 25-11, 32 FR 6913, May 5, 1967]

Section 25.1157 Carburetor air temperature
controls.
There must be a separate carburetor
air temperature control for each engine.
Section 25.1159

Supercharger controls.

Each supercharger control must be
accessible to the pilots or, if there is a
separate flight engineer station with a
control panel, to the flight engineer.
Section 25.1161 Fuel jettisoning system controls.
Each fuel jettisoning system control
must have guards to prevent inadvertent operation. No control may be
near any fire extinguisher control or
other control used to combat fire.

331

VerDate Sep<11>2014

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00341

Fmt 8010

Sfmt 8010

Y:\SGML\247046.XXX

247046