796 

14 CFR Ch. I (1–1–14 Edition) 

§ 29.1145 

(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 en-

gines. 

(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 inad-
vertent 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 automati-
cally activate and control the 30-sec-
ond 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] 

§ 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 con-
trol. 

(c) Each group of ignition switches, 

except ignition switches for turbine en-
gines 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] 

§ 29.1147

Mixture controls. 

(a) If there are mixture controls, 

each engine must have a separate con-
trol, and the controls must be arranged 
to allow— 

(1) Separate control of each engine; 

and 

(2) Simultaneous control of all en-

gines. 

(b) Each intermediate position of the 

mixture controls that corresponds to a 
normal operating setting must be iden-
tifiable by feel and sight. 

§ 29.1151

Rotor brake controls. 

(a) It must be impossible to apply the 

rotor brake inadvertently in flight. 

(b) There must be means to warn the 

crew if the rotor brake has not been 
completely released before takeoff. 

§ 29.1157

Carburetor air temperature 

controls. 

There must be a separate carburetor 

air temperature control for each en-
gine. 

§ 29.1159

Supercharger controls. 

Each supercharger control must be 

accessible to— 

(a) The pilots; or 
(b) (If there is a separate flight engi-

neer station with a control panel) the 
flight engineer. 

§ 29.1163

Powerplant accessories. 

(a) Each engine mounted accessory 

must— 

(1) Be approved for mounting on the 

engine involved; 

(2) Use the provisions on the engine 

for mounting; and 

(3) Be sealed in such a way as to pre-

vent contamination of the engine oil 
system and the accessory system. 

(b) Electrical equipment subject to 

arcing or sparking must be installed, 
to minimize the probability of igniting 
flammable fluids or vapors. 

(c) If continued rotation of an engine- 

driven cabin supercharger or any re-
mote accessory driven by the engine 
will be a hazard if they malfunction, 
there must be means to prevent their 
hazardous rotation without interfering 
with the continued operation of the en-
gine. 

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