Federal Aviation Administration, DOT

Section 29.1147

(c) Each flexible powerplant control
must be approved.
(d) Each control must be able to
maintain any set position without - 
(1) Constant attention; or
(2) Tendency to creep due to control
loads or vibration.
(e) Each control must be able to
withstand operating loads without excessive deflection.
(f) Controls of powerplant valves required for safety 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.
(Secs. 313(a), 601, and 603, 72 Stat. 752, 775, 49
U.S.C. 1354(a), 1421, and 1423; sec. 6(c), 49
U.S.C. 1655(c))
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29-13, 42 FR 15046, Mar. 17,
1977; Amdt. 29-26, 53 FR 34219, Sept. 2, 1988]

Section 29.1142 Auxiliary power unit controls.
Means must be provided on the flight
deck for starting, stopping, and emergency shutdown of each installed auxiliary power unit.
(Secs. 313(a), 601, 603, 604, Federal Aviation
Act of 1958 (49 U.S.C. 1354(a), 1421, 1423, 1424),
sec. 6(c), Dept. of Transportation Act (49
U.S.C. 1655(c)))

spaschal on DSK3GDR082PROD with CFR

[Amdt. 29-17, 43 FR 50602, Oct. 30, 1978]

Section 29.1143 Engine controls.
(a) There must be a separate power
control for each engine.
(b) Power controls must be arranged
to allow ready synchronization of all
engines by - 
(1) Separate control of each engine;
and
(2) Simultaneous control of all engines.
(c) Each power control must provide
a positive and immediately responsive
means of controlling its engine.
(d) Each fluid injection control other
than fuel system control must be in
the corresponding power control. How-

ever, the injection system pump may
have a separate control.
(e) If a power control incorporates a
fuel shutoff feature, the control must
have a means to prevent the inadvertent movement of the control into
the shutoff 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.
(f) For rotorcraft to be certificated
for a 30-second OEI power rating, a
means must be provided to automatically activate and control the 30-second OEI power and prevent any engine
from exceeding the installed engine
limits associated with the 30-second
OEI power rating approved for the
rotorcraft.
[Amdt. 29-26, 53 FR 34219, Sept. 2, 1988, as
amended by Amdt. 29-34, 59 FR 47768, Sept.
16, 1994]

Section 29.1145

Ignition switches.

(a) Ignition switches must control
each 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.
(Secs. 313(a), 601, and 603, 72 Stat. 759, 775, 49
U.S.C. 1354(a), 1421, and 1423; sec. 6(c), 49
U.S.C. 1655 (c))
[Doc. No. 5084, 29 FR 16150, Dec. 3, 1964, as
amended by Amdt. 29-13, 42 FR 15046, Mar. 17,
1977]

Section 29.1147

Mixture controls.

(a) If there are mixture controls,
each engine must have a separate control, and the controls must be 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.

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