Code of Federal Regulations - Title 14

291

Federal Aviation Administration, DOT

§ 23.1145

OWERPLANT

ONTROLS AND

CCESSORIES

§ 23.1141

Powerplant controls: Gen-

eral.

(a) Powerplant controls must be lo-

cated and arranged under § 23.777 and
marked under § 23.1555(a).

(b) Each flexible control must be

shown to be suitable for the particular
application.

maintain any necessary position with-
out—

(1) Constant attention by flight crew

members; or

(2) Tendency to creep due to control

loads or vibration.

(d) Each control must be able to

withstand operating loads without fail-
ure or excessive deflection.

(e) For turbine engine powered air-

planes, no single failure or malfunc-
tion, or probable combination thereof,
in any powerplant control system may
cause the failure of any powerplant
function necessary for safety.

(f) The portion of each powerplant

control located in the engine compart-
ment that is required to be operated in
the event of fire must be at least fire
resistant.

(g) Powerplant valve controls located

in the cockpit must have—

(1) For manual valves, positive stops

or in the case of fuel valves suitable
index provisions, in the open and closed
position; and

(2) For power-assisted valves, a

means to indicate to the flight crew
when the valve—

(i) Is in the fully open or fully closed

position; or

(ii) Is moving between the fully open

and fully closed position.

[Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, as
amended by Amdt. 23–7, 34 FR 13095, Aug. 13,
1969; Amdt. 23–14, 38 FR 31823, Nov. 19, 1973;
Amdt. 23–18, 42 FR 15042, Mar. 17, 1977; Amdt.
23–51, 61 FR 5137, Feb. 9, 1996]

§ 23.1142

Auxiliary power unit con-

trols.

Means must be provided on the flight

deck for the starting, stopping, moni-
toring, and emergency shutdown of
each installed auxiliary power unit.

[Doc. No. 26344, 58 FR 18974, Apr. 9, 1993]

§ 23.1143

Engine controls.

(a) There must be a separate power or

thrust control for each engine and a
separate control for each supercharger
that requires a control.

(b) Power, thrust, and supercharger

controls must be arranged to allow—

(1) Separate control of each engine

and each supercharger; and

(2) Simultaneous control of all en-

gines and all superchargers.

charger control must give a positive
and immediate responsive means of
controlling its engine or supercharger.

(d) The power, thrust, or super-

charger controls for each engine or su-
percharger must be independent of
those for every other engine or super-
charger.

(e) For each fluid injection (other

than fuel) system and its controls not
provided and approved as part of the
engine, the applicant must show that
the flow of the injection fluid is ade-
quately controlled.

(f) If a power, thrust, or a fuel con-

trol (other than a mixture control) in-
corporates a fuel shutoff feature, the
control must have a means to prevent
the inadvertent movement of the con-
trol into the off position. The means
must—

(1) Have a positive lock or stop at the

idle position; and

(2) Require a separate and distinct

operation to place the control in the
shutoff position.

(g) For reciprocating single-engine

airplanes, each power or thrust control
must be designed so that if the control
separates at the engine fuel metering
device, the airplane is capable of con-
tinued safe flight and landing.

[Amdt. 23–7, 34 FR 13095, Aug. 13, 1969, as
amended by Amdt. 23–17, 41 FR 55465, Dec. 20,
1976; Amdt. 23–29, 49 FR 6847, Feb. 23, 1984;
Amdt. 23–43, 58 FR 18974, Apr. 9, 1993; Amdt.
23–51, 61 FR 5137, Feb. 9, 1996]

§ 23.1145

Ignition switches.

(a) Ignition switches must control

and shut off each ignition circuit on
each engine.

(b) There must be means to quickly

shut off all ignition on multiengine air-
planes by the grouping of switches or
by a master ignition control.

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